Azotometer for nitrogen determination

Azotometer for nitrogen determination, Total:454 items.

The international standard classification for "Azotometer for nitrogen determination" includes: Fertilizers , Farming and forestry , Chemical laboratories. Laboratory equipment , Coals , Ferroalloys , Rubber , Spices and condiments. Food additives .

The Chinese standard classification for "Azotometer for nitrogen determination" includes: Soil and fertilizer in general , Electrochemical, thermochemistry and optical profile type analyzer , Coal analysis methods , Steel and iron alloy analysis method , Basic standards and general methods on chemical fertilizers , Rubber products in general , Chemical fertilizer and chemical soil conditioner , Flavoring materials , Analysis methods for toxic substances in water , Analysis methods for exhaust emission pollutants .

Ningxia Provincial Standard of the People's Republic of China

DB64/T 1734-2020 Soil Hydrolyzable Nitrogen Determination Kjeldahl Method

Professional Standard - Agriculture

NY/T 1121.24-2012 Soil Testing - Part 24: Determination of Total Nitrogen in Soil - Automatic Kjeldahl Apparatus Method
NY/T 2542-2014 Fertilizers. Determination of total nitrogen nitrogen content
219药典三部-2020 Content Determination Method 0704 Nitrogen Determination Method
NY/T 2419-2013 Determination of total nitrogen in plant - Automatic kjeldahl apparatus method
NY/T 297-1995 Determination of Total Nitrogen in Organic Fertilizers
NY/T 1116-2014 Fertilizer - Determination for content of nitrate nitrogen, ammonium nitrogen and amidonitrogen
ZB X 66038-1987 Amino nitrogen determination method
105药典四部-2015 0700 Other determination methods 0704 Nitrogen determination method
NY/T 2017-2011 Determination of nitrogen,phosphorus and potassium in plants

General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China

GB/T 24583.3-2009 Vanadium-Nitrogen alloy-Determination of nitrogen content—The distillation-neutralization titration method
GB/T 19227-2008 Determination of nitrogen in coal
GB/T 5687.4-2016 Nitrogen-bearing ferrochromium and nitride ferrochrome with high nitrogen content—Determination of nitrogen content—The distillation-neutralization titration method
GB/T 3597-2002 Fertilizer - Determination of nitrate nitrogen content - Nitron gravimetric method
GB/T 2441.1-2001 Determination of urea-Determination of total nitrogen content
GB/T 24583.3-2019 Vanadium-nitrogen—Determination of nitrogen content—Distillation-neutralization titration method
SN/T 4764-2017 Determination of total carbon,hydrogen,nitrogen and sulfur content in coal—Elemental analyzer method
GB 3597-1983 Determination of nitrate nitrogen content in fertilizers Nitrogen reagent gravimetric method
GB/T 22923-2008 Determination of nitrogen,phosphorus and potassium for fertilizers by auto analyzer
GB/T 35582-2017 Sulfur and nitrogen elemental analyzers
GB/T 33862-2017 Automatic(semi) Kjeldahl analyzer
GB/T 30733-2014 Determination of total carbon, hydrogen and nitrogen content in coal—Instrumental method
GB/T 40723-2021 Rubber—Determination the contents of total sulfur and total nitrogen — Automatic analyser method
GB/T 11891-1989 Water quality--Determination of Kjeldahl nitrogen

Group Standards of the People's Republic of China

T/NAIA 001-2020 Determination of ammoniacal nitrogen in fermented feed Kjeldahl method
T/NAIA 044-2021 Urine Total Nitrogen Determination in Livestock Kjeldahl Method
T/NAIA 0139-2022 Diesel engine nitrogen oxide reducing agent urea aqueous solution (AUS 32) Determination of urea content Automatic Kjeldahl method
T/QAS 071-2021 Determination of total nitrogen in brine Kjeldahl method
T/CIMA 0041-2021 Ammonia Nitrogen Rapid Tester
T/NAIA 0208-2023 Determination of Stable Isotope Ratio of Carbon and Nitrogen in Lycium Barbarum by Stable Isotope Analyzer Method
T/CMA 031-2021 Calibration method for basic nitrogen meters

Inner Mongolia Provincial Standard of the People's Republic of China

DB15/T 1236-2017 Determination of volatile basic nitrogen in feedstuffs of animal origin by automatic Kjeldahl method

Yunnan Provincial Standard of the People's Republic of China

DB53/T 917-2019 Determination methods of carbon-nitrogen ratio, self-heating, ammonium-nitrate ratio and germination index in organic fertilizer maturity

National Metrological Verification Regulations of the People's Republic of China

JJG 631-2013 Ammonia-Nitrogen Automatic Analyzers
JJG 656-2013 Nitrate-Nitrogen Automatic Analyzers

Professional Standard - Ferrous Metallurgy

YB/T 4529-2016 Nitrogen-bearing ferromanganese. Determination of nitrogen content. Thermal conductimetric method after fusion in a current of inert gas
YB/T 4530-2016 Nitrogen-bearing ferromanganese. Determination of nitrogen content. The distillation-neutralization titration method
YB/T 4566.1-2016 Ferrovanadium nitride. Determination of conduct. Thermal conductimetric method after fusion in a current of inert gas
YB/T 4566.2-2016 Ferrovanadium nitride. Determination of nitrogen content. Distillation separation-acid-base neutral titration method
YB/T 4582.7-2017 Ferrosilicon nitride-Determination of total nitrogen content-Neutralization titration method
YB/T 4528-2016 Nitrogen-bearing ferrochromium and nitride ferrochrome with high nitrogen content. Determination of nitrogen contenr. Thermal conductimetric method after fusion in a current of inert gas

Jilin Provincial Standard of the People's Republic of China

DB22/T 1932-2013 Determination method of total nitrogen content in peat (Kjeldahl method)

Military Standard of the People's Republic of China-General Armament Department

GJB 337-1987 Determination method of nitrogen content of nitrocellulose (interferometer method)

Professional Standard - Business

SB/T 10318-1999 Analysis of ammoniacal nitrogen

Professional Standard - Military and Civilian Products

WJ 2261-1994 Verification rules for thermal conductivity and infrared absorption nitrogen and oxygen detectors

Sichuan Provincial Standard of the People's Republic of China

DB51/T 1875-2014 Determination of soil alkaline nitrogen

Ministry of Ecology and Environment of the People's Replublic of China

GB 11891-1989 Water quility-Determination of Kjeldahl nitrogen

Professional Standard - Forestry

LY/T 1228-2015 Nitrogen determination methods of forest soils
LY/T 1230-1999 Determination of nitrate nitrogen in forest soil
LY/T 1228-1999 Determination of total nitrogen in forest soil

Professional Standard - Environmental Protection

HJ/T 64.3-2001 Stationary source emission -- Determination of cadmium p-Azobenzenediazoaminazobenzene sulfonic acid spectrophotometric method

未注明发布机构

JIS H 1685:1976(1986) Methods for Determination of Nitrogen in Tantalum

Tianjin Provincial Standard of the People's Republic of China

DB12/T 1270-2023 Determination of cracked nitrogen in soil

Chongqing Provincial Standard of the People's Republic of China

DB50/T 833-2017 Determination of nitrogen oxides in ambient air (nitrogen monoxide and nitrogen dioxide) by chemiluminescence

Professional Standard - Urban Construction

CJ/T 75-1999 Municipal sewage.Determination of nitrogen(ammonia)

Hebei Provincial Standard of the People's Republic of China

DB13/T 843-2007 Soil Available Nitrogen Determination

Liaoning Provincial Standard of the People's Republic of China

DB21/T 616-1991 Plant total nitrogen determination method

Shandong Provincial Standard of the People's Republic of China

DB37/T 2485-2014 Technical conditions for full (semi) automatic Kjeldahl nitrogen analyzer

CZ-CSN

CSN 70 4243-1981 Glass apparatus by Parnas-Wagner for the determination of nitrogen
CSN 56 0020-1987 General directions for the determination f nitrogen by the Kjeldahl method
CSN 68 4125-1980 DetenninatioQ of small mounts of nitratcs
CSN ISO 1871:1994 Agricultural food products-General directions for the determination of nitrogen by the Kjeldahl method
CSN 44 1356-1962 Solid Fuels. Determination of Nitrogen
CSN 68 4124-1980 Determination of small mounts of total nitrogen
CSN 42 0648 Cast.5-1986 Chemical analysis of metallic chromium. Determination of nitrogen by the titration and by the method with automatic analyzers
CSN 65 0176 Cast.7-1979 Testing methods for tarch. Determination of nitrogen
CSN 65 4814-1976 Determinaíion of nitrogen oontent in fertilizers

IN-BIS

IS 5194-1969 Determination method of nitrogen-Kjeldahl method

International Organization for Standardization (ISO)

ISO 332:1981 Coal — Determination of nitrogen — Macro Kjeldahl method
ISO 332:1974 Title missing - Legacy paper document
ISO 333:1983 Coal; Determination of nitrogen; Semi-micro Kjeldahl method
ISO 11261:1995 Soil quality - Determination of total nitrogen - Modified Kjeldahl method
ISO 8968-5:2001|IDF 20-5:2001 Determination of milk nitrogen content Part 5: Determination of protein nitrogen content
ISO 8968-1:2001 | IDF 20-1: 2001 Milk — Determination of nitrogen content — Part 1: Kjeldahl method
ISO 8968-4:2001 | IDF 20-4:2001 Milk — Determination of nitrogen content — Part 4: Determination of non-protein-nitrogen content
ISO 8968-5:2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
ISO 8968-5:2001 | IDF 20-5:2001 Milk — Determination of nitrogen content — Part 5: Determination of protein-nitrogen content
ISO 29541:2010 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental method
ISO 8968-4:2001|IDF 20-4:2001 Determination of milk nitrogen content Part 4: Determination of non-protein nitrogen content
ISO 8968-4:2001 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content
ISO 25475:2016 Fertilizers - Determination of ammoniacal nitrogen
ISO 15604:2016 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
ISO/TR 11905-2:1997 Water quality - Determination of nitrogen - Part 2: Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
ISO 1871:2009 Food and feed products - General guidelines for the determination of nitrogen by the Kjeldahl method
ISO/TS 12902:2001 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
ISO/CD 29541:1976 Solid mineral fuels — Determination of total carbon, hydrogen and nitrogen content — Instrumental method
ISO 29541:2025 Coal and coke — Determination of total carbon, hydrogen and nitrogen — Instrumental method

British Standards Institution (BSI)

BS EN 12260:2003(2008)*BS 6068-2.83:2003 Water quality - Determination of nitrogen - Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
BS EN ISO 8968-1:2002 Milk. Determination of nitrogen content-Kjeldahl method
BS 1428-B1:1964 Microchemical analysis. Apparatus for the determination of elements by other than combustion methods-Specification for nitrogen determination apparatus (micro-Kjeldahl)
BS 1428-B1:1953 Microchemical analysis. Apparatus for the determination of elements by other than combustion methods. Specification for nitrogen determination apparatus (micro-Kjeldahl)
BS EN 12260-2003(2008)*BS 6068-2.83:2003 Water quality — Determination of nitrogen — Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
BS 1428-B3:1964 Microchemical apparatus. Apparatus for the determination of elements by other than combustion methods.-Specification for nitrogen determination apparatus (non-transference micro-Kjeldahl)
BS EN 12260:2003 Water quality. Determination of nitrogen. Determination of bound nitrogen (TN<sub>b</sub>), following oxidation to nitrogen oxides
BS EN ISO 8968-5:2002 Milk. Determination of nitrogen content. Determination of protein-nitrogen content
BS EN ISO 8968-4:2002 Milk. Determination of nitrogen content. Determination of non-protein nitrogen content
BS 5551-4.1.2:1982 Fertilizers. Chemical analysis. Determination of nitrogen. Determination of ammoniacal nitrogen, titrimetric method after distillation
BS DD CEN/TS 15558:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
BS DD CEN/TS 15559:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
BS EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
BS DD CEN/TS 15604:2007 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
08/30179332 DC BS EN 15604. Fertilizers. Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
BS DD CEN/TS 15750:2008 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
BS DD ENV 12260:1996 Water quality. Determination of nitrogen. Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
DD CEN/TS 15604:2007 Fertilizers — Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
BS DD CEN/TS 15750:2006 Fertilizers. Determination of different forms of nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
14/30313910 DC BS ISO 15604. Fertilizers. Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
DD CEN/TS 15562:2007 Fertilizers. Determination of cyanamide nitrogen
BS EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen
BS 5551-4.1.3:1986 Fertilizers. Chemical analysis. Determination of nitrogen. Method for determination of total nitrogen content (titrimetric method after distillation)
BS 7755-3.7:1995 Soil quality. Chemical methods. Determination of total nitrogen. Modified Kjeldahl method
BS EN 15475:2009 Fertilizers — Determination of ammoniacal nitrogen
DD ENV 12260-1996 Water quality. Determination of nitrogen. Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
DD CEN/TS 15559:2007 Fertilizers. Determination of nitric and ammoniacal nitrogen according to Arnd
BS ISO 29541:2025 Coal and coke. Determination of total carbon, hydrogen and nitrogen. Instrumental method
BS EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS ISO 6851:2001 Photography. Processing waste. Determination of total amino nitrogen (microdiffusion Kjeldahl method)
BS EN 15750:2010 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS EN ISO 3188:1994(1999) Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method
BS DD ISO/TS 12902:2002 Solid mineral fuels. Determination of total carbon, hydrogen and nitrogen. Instrumental methods
24/30474161 DC BS ISO 29541 Coal - Determination of total carbon, hydrogen and nitrogen content. Instrumental method
BS DD CEN/TS 15475:2006 Fertilizers - Determination of ammoniacal nitrogen
BS DD CEN/TS 15562:2007 Fertilizers - Determination of cyanamide nitrogen
BS 5551-4.1.5:1993 Fertilizers. Chemical analysis. Determination of nitrogen.-Method for determination of urea nitrogen content (gravimetric method using xanthydrol)
BS EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
BS DD ISO/TS 17837:2008 Milk and milk products. Determination of nitrogen content and crude protein calculation. Kjeldahl method
BS EN 15104:2011 Solid biofuels. Determination of total content of carbon, hydrogen and nitrogen. Instrumental methods
BS EN ISO 4945:2018 Steel. Determination of nitrogen. Spectrophotometric method

Danish Standards Foundation

DANSK DS/EN 12260:2003 Water quality – Determination of nitrogen – Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
DS/EN 12260:2004 Water quality - Determination of nitrogen - Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
DS/EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
DS/EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
DANSK DS/EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
DS/EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
DS/EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method
DS/EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
DANSK DS/EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
DANSK DS/ISO 15604:2020 Fertilizers – Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
DANSK DS/EN 15475:2009 Fertilizers - Determination of ammoniacal nitrogen
DANSK DS/EN 12135:1997 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
DS/EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
DS/EN ISO 8968-4:2002 Milk - Determination of nitrogen content - Part 4: Determination of non-protein nitrogen content
DS/EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
DS/EN 15475:2009 Fertilizers - Determination of ammoniacal nitrogen
DANSK DS/ISO 25475:2020 Fertilizers – Determination of ammoniacal nitrogen
DANSK DS/ISO 1871:2009 Food and feed products - General guidelines for the determination of nitrogen by the Kjeldahl method
DANSK DS/EN 15562:2009 Fertilizers – Determination of cyanamide nitrogen
DS 224:1975 Water analysis. Determination of ammonia-nitrogen
DS/EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
DANSK DS/EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
DANSK DS/EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
DANSK DS/EN ISO 3188:1994 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method
DANSK DS 224:1975 Water survey. Determination of ammonium nitrogen
DANSK DS/EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
DS/ISO 1871:2009 Food and feed products - General guidelines for the determination of nitrogen by the Kjeldahl method
DS 223:1991 Water analysis. Determination of the sum of nitrite- and nitrate-nitrogen
DS/EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen
DANSK DS/ISO 29541:2010 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental method
DS/EN ISO 3188:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method
DANSK DS/EN 15478:2009 Fertilizers - Determination of total nitrogen in urea
DS/ISO 29541:2011 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental method
DS/EN 15104:2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods

Association Francaise de Normalisation

NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
NF T90-060:2004 Water quality - Determination of nitrogen - Determination of bound nitrogen (TN sub b), following oxidation to nitrogen oxides.
NF U42-141:1984 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method.
NF U42-191:2019 Fertilizers - Nitrogenous fertilizers containing synthetic organic nitrogen - Determination of the types of nitrogen
NF EN 12135:1997 Fruit and vegetable juices - Nitrogen dosage - Kjeldahl method
NF U42-144*NF EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
NF U42-145*NF EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
NF U42-147*NF EN 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrate
NF U42-117:1965 Products used in agriculture. Fertilizers. Determination of nitrogen content in class a nitrogenous fertilizers.
NF U42-119:1965 Products used in agriculture. Determination of nitrogen content in class C nitrogenous fertilizers.
NF U42-149*NF EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
NF U42-118:1965 Products used in agriculture. Determination of nitrogen content in class B nitrogenous fertilizers.
NF V04-221-5:2002 Milk - Determination of nitrogen content - Part 5 : determination of protein-nitrogen content.
NF U42-191:1988 Fertilizers. Nitrogenous fertilizers containing synthetic organic nitrogen. Determination of the types of nitrogen.
NF EN 15475:2009 Fertilizers - Determination of ammoniacal nitrogen
NF V04-221-4:2002 Milk - Determination of nitrogen content - Part 4 : determination of non-protein nitrogen content.
NF EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen
NF U42-121*NF EN 15475:2009 Fertilizers - Determination of ammoniacal nitrogen
NF EN ISO 3188:1994 Starches and derived products - Determination of nitrogen according to the Kjeldahl method - Titrimetric method
NF U42-100:1965 Products used in agriculture. Nitrogenous fertilizers. Quantity determination of various forms of nitrogen. General presentation.
NF X31-111*NF ISO 11261:1995 Soil quality. Determination of total nitrogen. Modified kjeldahl method.
NF M03-018:2003 Solid mineral fuels - Determination of nitrogen.
NF V03-750:1999 Cereals and pulses. Determination of the nitrogen content and calculation of the raw protein content. Kjeldahl method.
NF V59-202:1988 Collagenes. Determination of the nitrogen content.
NF U42-148*NF EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen.
NF U42-142*NF EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
NF V03-032:2024 Foodstuffs - Determination of the nitrogen content by the Kjeldahl method and calculation of the protein content
NF ISO 1871:2009 Food and feed products - General guidelines for the determination of nitrogen using the Kjeldahl method
NF U42-503*NF EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
NF X34-117:2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods.

BE-NBN

NBN T 91-255-1976 Water analysis methods - Determination of the ammoniacal and organic nitrogen - (Kjeldahl nitrogen)

Standards Norway

NS-EN 12260:2003 Water quality — Determination of nitrogen — Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
NS-EN 15750:2009 Fertilizers — Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
SN-CEN/TS 15750:2008 Fertilizers — Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
NS-EN 12135:1997 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
SN-CEN/TS 15604:2007 Fertilizers — Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
NS-EN 15604:2009 Fertilizers — Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
NS-EN 15475:2009 Fertilizers — Determination of ammoniacal nitrogen
NS-EN 15476:2009 Fertilizers — Determination of nitric and ammoniacal nitrogen according to Devarda
SN-CEN/TS 15475:2006 Fertilizers — Determination of ammoniacal nitrogen
NS 4746:1975 Water analysis - Determination of ammonia-nitrogen
SN-CEN/TS 15562:2007 Fertilizers — Determination of cyanamide nitrogen
NS-EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen
SN-CEN/TS 15476:2006 Fertilizers — Determination of nitric and ammoniacal nitrogen according to Devarda
SN-CEN/TS 15559:2007 Fertilizers — Determination of nitric and ammoniacal nitrogen according to Arnd
NS-EN 15559:2009 Fertilizers — Determination of nitric and ammoniacal nitrogen according to Arnd
NS-EN ISO 8968-1:2001 Milk — Determination of nitrogen content — Part 1: Kjeldahl method (ISO 8968-1:2001)
NS 4745:1991 Water analysis - Determination of the sum of nitrite nitrogen and nitrate nitrogen
NS-EN 15558:2009 Fertilizers — Determination of nitric and ammoniacal nitrogen according to Ulsch
NS-EN 13342:2000 Characterization of sludges — Determination of Kjeldahl nitrogen
NS-EN ISO 8968-5:2001 Milk — Determination of nitrogen content — Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
SN-CEN/TS 15558:2007 Fertilizers — Determination of nitric and ammoniacal nitrogen according to Ulsch
NS-EN ISO 8968-4:2001 Milk — Determination of nitrogen content — Part 4: Determination of non-protein nitrogen content (ISO 8968-4:2001)
NS-EN 15104:2011 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen — Instrumental methods
SN-CEN/TS 15104:2005 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen — Instrumental methods

Lithuanian Standards Office

LST EN 12260-2004 Water quality - Determination of nitrogen - Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
LST EN 15558-2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
LST EN 15604-2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
LST EN 15476-2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
LST EN 12135-2001 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
LST EN 15750-2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
LST EN 15475-2009 Fertilizers - Determination of ammoniacal nitrogen
LST EN 15559-2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
LST EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method (ISO 8968-1:2001)
LST EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
LST EN ISO 8968-4:2002 Milk - Determination of nitrogen content - Part 4: Determination of non-protein nitrogen content (ISO 8968-4:2001)
LST EN 15562-2009 Fertilizers - Determination of cyanamide nitrogen
LST EN 15104-2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods

Spanish Association for Standardization (UNE)

UNE-EN 12260:2004 Water quality - Determination of nitrogen - Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
UNE-EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
UNE-EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
AENOR UNE-EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
UNE 77318:2001 Soil quality. Determination of total nitrogen. Modified Kjeldahl method.
UNE-EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
UNE-EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
UNE-EN 15750:2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
UNE-CEN/TS 15604:2008 EX Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
UNE-EN 15475:2009 Fertilizers - Determination of ammoniacal nitrogen
UNE-CEN/TS 15475:2007 EX Fertilizers - Determination of ammoniacal nitrogen
UNE-CEN/TS 15562:2007 EX Fertilizers - Determination of cyanamide nitrogen
UNE 31015:1957 DETERMINATION OF NITROGEN BY LUNGE METHOD.
AENOR UNE-EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
UNE-EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
UNE-CEN/TS 15476:2007 EX Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
AENOR UNE-EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen
UNE-CEN/TS 15559:2007 EX Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
UNE-EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method. (ISO 8968-1:2001)
AENOR UNE-EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
UNE-EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen
UNE-CEN/TS 15558:2007 EX Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
AENOR UNE-EN ISO 8968-5:2002 Milk. Determination of nitrogen content. Part 5: Determination of protein nitrogen content. (ISO 8968-5:2001)
UNE-EN ISO 8968-4:2002 Milk - Determination of nitrogen content - Part 4: Determination of non-protein nitrogen content. (ISO 8968-4:2001)

Swedish Institute for Standards

SS-ISO 333:1996 Coal - Determination of nitrogen - Semi-micro Kjeldahl method
SS-ISO 11261:1996 Soil quality - Determination of total nitrogen - Modified Kjeldahl method
SS-EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
SS-EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
SS-EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
SS-EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
SS-EN 15475:2009 Fertilizers - Determination of ammoniacal nitrogen
SS-EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method (ISO 8968-1:2001)
ISO 3188 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method
ISO 6851 Photography - Processing waste - Determination of total amino nitrogen (microdiffusion Kjeldahl method)
SS 28101:1992 Nitrogen content of water - Determination with Kjeldahl method after reduction with Devarda's alloy
SS 28133:1991 Determination of the sum of the nitrite and nitrate nitrogen content of water
SS-EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
SS-EN ISO 8968-4:2002 Milk - Determination of nitrogen content - Part 4: Determination of non-protein nitrogen content (ISO 8968-4:2001)
SS-EN 15478:2009 Fertilizers - Determination of total nitrogen in urea

VN-TCVN

TCVN 6498-1999 Soil quality.Determination of total nitrogen.Modifierd Kejldahl method
TCVN 6624-2-2000 Water quality.Determination of nitrogen.Part 1: Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection

Korean Agency for Technology and Standards (KATS)

KS E ISO 333-2018 Coal－Determination of nitrogen－Semi-micro Kjeldahl method
KS E ISO 333-2003(2013) Coal－Determination of nitrogen－Semi-micro Kjeldahl method
KS E ISO 333:2003 Coal－Determination of nitrogen－Semi-micro Kjeldahl method
KS D 2530-1993 Determination of nitrogen in titanium
KS I ISO 11261-2008(2021) Soil quality－Determination of total nitrogen－Modified Kjeldahl method
KS I ISO 11261-2008(2018) Soil quality－Determination of total nitrogen－Modified Kjeldahl method
KS H ISO 1871-2013(2023) Agricultural food products ― General directions for the determination of nitrogen by the Kjeldahl method
KS I ISO 11261:2008 Soil quality-Determination of total nitrogen-Modified Kjeldahl method
KS I ISO 11261-2021 Soil quality－Determination of total nitrogen－Modified Kjeldahl method
KS H ISO 1871-2023 Agricultural food products ― General directions for the determination of nitrogen by the Kjeldahl method
KS D 2555-1995 Methods for determination of nitrogen in tantalum
KS H ISO 3188-2023 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Titrimetric method
KS M ISO 4176-2006(2011) Fertilizers－Determination of nitrate nitrogen content－Nitron gravimetric method
KS I ISO 11905-2-2008(2013) Water quality－Determination of nitrogen－Part 2：Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
KS D 2555-2015 Methods for determination of nitrogen in tantalum
KS H ISO 3188-2008(2023) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Titrimetric method
KS H ISO 3188-2008(2018) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Titrimetric method
KS D 1811-2003(2018) Methods for determination of nitrogen in iron and steel
KS M ISO 6851-2002(2017) Photography－Processing waste－Determination of total amino nitrogen－Microdiffusion Kjeldahl method
KS D 1811-2023 Methods for determination of nitrogen in iron and steel
KS D 1811-1993 Methods for determination of nitrogen in iron and steel
KS I ISO 11905-2:2008 Water quality-Determination of nitrogen-Part 2:Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
KS D 2555-2020 Determination of nitrogen in tantalum
KS D 1811-2003(2023) Methods for determination of nitrogen in iron and steel
KS H ISO 1871-2013(2018) Agricultural food products ― General directions for the determination of nitrogen by the Kjeldahl method
KS M ISO 6851-2022 Photography－Processing waste－Determination of total amino nitrogen－Microdiffusion Kjeldahl method
KS M ISO 6851:2002 Photography-Processing waste-Determination of total amino nitrogen-Microdiffusion Kjeldahl method

Association of Official Analytical Chemists (AOAC)

AOAC 991.20 AOAC Official Method 991.20 Nitrogen (Total) in Milk Kjeldahl Methods
AOAC Official Method 2001.14 Determination of total nitrogen in cheese

Gosstandart of Russia

GOST R ISO 15604-2019 Fertilizers. Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
GOST 34111-2017 Juice products. Determination of nitrogen content by Kjeldahl method
GOST EN 15604-2013 Fertilizers. Determination of different forms of nitrogen in the same sample: nitric, ammoniacal, cyanamide and urea nitrogen
GOST R 54244-2010 Solid mineral fuel. Instrumental method for determination of carbon, hydrogen and nitrogen
GOST EN 15559-2013 Fertilizers. Determination of nitric and ammoniacal nitrogen according to Arnd
GOST EN 15476-2013 Fertilizers. Determination of nitric and ammoniacal nitrogen according to Devarda
GOST 16698.13-1984 Metallic manganese. Method for determination of nitrogen
GOST 16698.13-1993 Metallic manganese and nitrated manganese. Method for determination of nitrogen
GOST EN 15558-2013 Fertilizers. Determination of nitric and ammoniacal nitrogen according to Ulsch selon
GOST 32979-2014 Solid mineral fuel. Instrumental method for determination of carbon, hydrogen and nitrogen
GOST EN 15475-2013 Fertilizers. Determination of ammoniacal nitrogen
GOST EN 15750-2016 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
GOST 2408.2-1975 Brown coals, hard coals, anthracite, combustible shales and turf. Method for thedetermination of nitrogen content
GOST 27749.0-1988 Carbamid. Method of nitrogen content determination
GOST 9853.1-1996 Sponge titanium. Method for determination of nitrogen
GOST 8775.4-1987 Lithium. Method of determination of nitrogen
GOST 34789-2021 Brewing products. Identification. Determination of mass concentration of total nitrogen by Kjeldahl method
GOST R 58596-2019 Soils. Methods for determination of total nitrogen
GOST 9853.1-1979 Sponge titanium. Method for the determination of nitrogen
GOST R 55246-2012 Milk and milk products. Determination of non-protein nitrogen content by Kjeldahl method
GOST 13020.7-1985 Metallic chrome. Methods for determination of nitrogen
GOST EN 15562-2013 Fertilizers. Determination of cyanamide nitrogen
GOST 24596.3-1981 Feed phosphates. Methods for determination of nitrogen
GOST 21600.6-1983 Ferrochrome. Method for the determination of nitrogen

German Institute for Standardization

DIN EN 12260:2003 Water quality - Determination of nitrogen - Determination of bound nitrogen (TN<(Index)b>), following oxidation to nitrogen oxides; German version EN 12260:2003
DIN EN 15750:2010-02 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version EN 15750:2009
DIN EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd; English version of DIN EN 15559:2009-06
DIN EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch; English version of DIN EN 15558:2009-06
DIN EN 12135:1997-12 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method; German version EN 12135:1997
DIN EN 15475:2009-04 Fertilizers - Determination of ammoniacal nitrogen; German version EN 15475:2009 / Note: To be replaced by DIN EN ISO 25475 (2019-06).
DIN EN 15750 E:2009 Draft Document - Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version prEN 15750:2009
DIN CEN/TS 15604:2008 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen; German version CEN/TS 15604:2007
DIN EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001); German version EN ISO 8968-5:2001
DIN EN 15750 E:2009-04 Draft Document - Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version prEN 15750:2009
DIN EN 15604:2009-06 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen; German version EN 15604:2009 / Note: To be replaced by DIN EN ISO 15604 (2019-06).
DIN 51722-1:1990-07 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
DIN EN ISO 11905-1:1998 Water quality - Determination of nitrogen - Part 1: Method using oxidative digestion with peroxodisulfate (ISO 11905-1:1997); German version EN ISO 11905-1:1998
DIN EN 15562:2021-12 Fertilizers - Determination of cyanamide nitrogen; German and English version prEN 15562:2021 / Note: Date of issue 2021-11-05*Intended as replacement for DIN EN 15562 (2009-06).
DIN EN 15475:2009 Fertilizers - Determination of ammoniacal nitrogen; English version of DIN EN 15475:2009-04
DIN EN 15562:2021 Fertilizers - Determination of cyanamide nitrogen; German and English version prEN 15562:2021
DIN EN 15559:2009-06 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd; German version EN 15559:2009
DIN EN ISO 8968-4:2002 Milk - Determination of nitrogen content - Part 4: Determination of the non-protein-nitrogen content (ISO 8968-4:2001); German version EN ISO 8968-4:2001
DIN EN 15476:2009-04 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda; German version EN 15476:2009
DIN EN 15562:2009-06 Fertilizers - Determination of cyanamide nitrogen; German version EN 15562:2009 / Note: To be replaced by DIN EN 15562 (2021-12).
DIN EN ISO 25475 E:2019-06 Fertilizers – Determination of ammoniacal nitrogen (ISO 25475:2016)
DIN EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen; English version of DIN EN 15562:2009-06
DIN EN ISO 15604 E:2019 Draft Document - Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen (ISO 15604:2016); German and English version prEN ISO 15604:2019
DIN CEN/TS 15562:2007 Fertilizers - Determination of cyanamide nitrogen; German version CEN/TS 15562:2007
DIN EN ISO 8968-1:2002 Milk — Determination of nitrogen content — Part 1: Kjeldahl method (ISO 8968-1:2001)
DIN CEN/TS 15750:2008 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods; German version CEN/TS 15750:2008
DIN CEN/TS 15558:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch; German version CEN/TS 15558:2007
DIN EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen; English version of DIN EN 15604:2009-06
DIN 12702:1978 Laboratory glassware; volumetric glassware for gas analysis, gas burettes, azotometers, eudiometers, nitrometers
DIN EN 15562:2023 Inorganic fertilizers - Determination of cyanamide nitrogen
DIN 51732:2014-07 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
DIN 51732 E:2013-07 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods

The Directorate General of Specifications and Metrology (DGSM)

OS GSO ISO 11261:2015 Soil quality -- Determination of total nitrogen -- Modified Kjeldahl method
OS GSO ISO 1871:2008 Agricultural food products — General directions for the determination of nitrogen by the Kjeldahl method
OS GSO ISO 8968-5:2014 Milk -- Determination of nitrogen content -- Part 5: Determination of protein-nitrogen content
OS GSO ISO 29541:2014 Solid mineral fuels -- Determination of total carbon, hydrogen and nitrogen content -- Instrumental method

CEN - European Committee for Standardization

PD CEN/TS 15558:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
PD CEN/TS 15476:2006 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
PD CEN/TS 15475:2006 Fertilizers - Determination of ammoniacal nitrogen
PD CEN/TS 15559:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
PD CEN/TS 15562:2007 Fertilizers - Determination of cyanamide nitrogen
PD CEN/TS 15104:2005 Solid biofuels - Determination of total content of carbon@ hydrogen and nitrogen - Instrumental methods
PD CEN/TS 15604:2007 Fertilizers - Determination of different forms of nitrogen in the same sample@ containing nitrogen as nitric@ ammoniacal@ urea and cyanamide nitrogen

Bureau of Indian Standards

IS 14684-1999 Determination of Nitrogen and Nitrogenous Compounds in Soils
IS 3025-34-1-2023 Methods of Sampling and Test (Physical and Chemical) for Water and Wastewater - Part 34 Nitrogen - Section 1 Determination of Various Types of Nitrogen like Ammoniacal, Nitrate, Nitrite and Organic Nitrogen
IS 16612-2018 Solid Mineral Fuels â€” Determination of Total Carbon, Hydrogen and Nitrogen Content â€” Instrumental Method
IS 14825-2000 Animal Feeding Stuff - Determination of Nitrogen Content and Calculation of Crude Protein Content - Kjeldahl Method

European Committee for Standardization (CEN)

EN 12260:2003 Water quality - Determination of nitrogen - Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
DD ENV 12 260-1996 Water Quality - Determination of Nitrogen - Determination of Bound Nitrogen, After Combustion and Oxidation to Nitrogen Dioxide, Using Chemiluminescence Detection
EN 15475:2009 Fertilizers - Determination of ammoniacal nitrogen
PD CEN/TS 15750:2008 Fertilizers - Determination of different forms of nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
EN ISO 8968-5:2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
EN 15104:2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd

Kingdom of Bahrain Testing and Metrology Directorate

BH GSO ISO 11261:2017 Soil quality -- Determination of total nitrogen -- Modified Kjeldahl method
BH GSO ISO 25475:2022 Fertilizers — Determination of ammoniacal nitrogen
BH GSO ISO 29541:2016 Solid mineral fuels -- Determination of total carbon, hydrogen and nitrogen content -- Instrumental method

GCC Standardization Organization

GSO ISO 11261:2015 Soil quality -- Determination of total nitrogen -- Modified Kjeldahl method
GSO ISO 8968-5:2014 Milk -- Determination of nitrogen content -- Part 5: Determination of protein-nitrogen content
GSO ISO 1871:2008 Agricultural food products — General directions for the determination of nitrogen by the Kjeldahl method
GSO ISO 25475:2021 Fertilizers — Determination of ammoniacal nitrogen
GSO ISO 6851:2015 Photography -- Processing waste -- Determination of total amino nitrogen (microdiffusion Kjeldahl method)
GSO ISO 3188:2015 Starches and derived products -- Determination of nitrogen content by the Kjeldahl method -- Titrimetric method
GSO ISO 29541:2014 Solid mineral fuels -- Determination of total carbon, hydrogen and nitrogen content -- Instrumental method
GSO ISO 4945:2015 Steel -- Determination of nitrogen content -- Spectrophotometric method

Ente Nazionale Italiano di Unificazione

UNI EN 12260:2004 Water quality - Determination of nitrogen - Determination of bound nitrogen (TNb), following oxidation to nitrogen oxides
UNI CEN/TS 15478:2006 Fertilizers - Determination of total nitrogen in urea
UNI EN 12135:1999 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
UNI CEN/TS 15604:2008 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
UNI EN ISO 8968-5:2002 Milk - Determination of nitrogen content - Determination of protein- nitrogen content
UNI EN 15604:2009 Fertilizers - Determination of different forms of nitrogen in the same sample, containing nitrogen as nitric, ammoniacal, urea and cyanamide nitrogen
UNI EN 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
UNI EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
UNI EN ISO 8968-4:2002 Milk - Determination of nitrogen content - Determination of non-protein nitrogen content
UNI 9971:1992 Adhesives. Determination of total nitrogen.
UNI CEN/TS 15562:2007 Fertilizers - Determination of cyanamide nitrogen
UNI CEN/TS 15559:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
UNI EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
UNI CEN/TS 15475:2006 Fertilizers - Determination of ammoniacal nitrogen
UNI ENV 12260:1998 Water quality - Determination of nitrogen - Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection.
UNI EN 15562:2009 Fertilizers - Determination of cyanamide nitrogen
EC 1-2023 UNI EN 13654-1:2001 Soil improvers and growing media - Determination of nitrogen - Modified Kjeldahl metho
UNI EN 13654-1:2001 Soil improvers and growing media - Determination of nitrogen - Modified Kjeldahl method
UNI CEN/TS 15558:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
UNI 9249:1988 Biomass. Determination of total nitrogen.
UNI EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
UNI EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
UNI EN 15562:2023 Inorganic fertilizers - Determination of cyanamide nitrogen

PL-PKN

PN C04576 ArkusZ02-1973 Water and waste water Tests for nitrogen Determination of ammonium nitrogen by titrimetric method
PN C04576 ArkusZ11-1973 Water and waste water Tests for nitrogen Determination of organie nitrogen
PN C04576 ArkusZ13-1973 Water and waste water Tests for nilrogen Determination of albuminous nitrogen
PN G04561-1992 Solid fuels. Determination of nitrogen with the use of the Perkin-Elmer analyser
PN C04576 ArkusZ12-1973 Water and waste water Tests for nitrogenDetermination of total nitrogen of Kjeldahl
PN C87077-1992 Nitrogenous fertilizers. Determination of cooper
PN C87078-1992 Nitrogenous fertilizers. Determination of chlorides
PN C04576 ArkusZ05-1973 Water and waste water Tests for nitrogen Determination of nitrogen in form of aramonia and ?n form of ammonium ions

Indonesia Standards

SNI 4146-2013 Method for determination of total nitrogen content in sediment by Kjeldahl titration method
SNI 19-1498-1989 Continuous NO and NO2 test apparatus in exhaust-gases

FI-SFS

SFS 3032-1976 Determination of ammonium nitrogen in water

International Dairy Federation (IDF)

IDF 20-1-2001 Milk - Determination of nitrogen content - Part 1: Kjeldahl method
IDF 20-5-2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
IDF 20-4-2001 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content

RO-ASRO

SR 184-25-1998 Ethyl alcohol. Determination of ammonia and azotic bases nitrogen content
SR ISO 4176:1981 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method
STAS 6417-1973 SOLID FUELS Determination of nitrogen
STAS 11411/1-1988 COMPLEX CHEMICAL FERTILIZERS Nitrogen determination
STAS SR ISO 7408:1993 Fertilizers. Determination of ammoniacal nitrogen content in the presence of other substances which release ammonia when treated with sodium hydroxide. Titrimetric method
STAS 6843-1982 STEELS ANI) CAST 1RONS Determination of nitrogen content

Magyar Szabványügyi Testület

MNOSZ 448-27.lap-1955 Determination of total nitrogen water
MSZ KGST 1239-1978 Determination of nitrogen content in iron and steel
MSZ 318/18-1981 Determination of total nitrogen in sludge test

South African Bureau of Standard

SANS 333:1996 Coal - Determination of nitrogen - Semi-micro Kjeldahl method
SANS 8968-5:2006 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
SANS 8968-4:2006 Milk - Determination of nitrogen content Part 4: Determination of non-protein-nitrogen content
SANS 12902:2007 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods

PT-IPQ

NP EN 12135-2000 Fruit and vegetable juices Determination of nitrogen content Kjeldahl method

American Society for Testing and Materials (ASTM)

ASTM E147-61(2017) Standard Specification for Apparatus for Microdetermination of Nitrogen by Kjeldahl Method
ASTM E147-61(2006) Standard Specification for Apparatus For Microdetermination Of Nitrogen By Kjeldahl Method
ASTM E147-61(1996) Standard Specification for Apparatus For Microdetermination Of Nitrogen By Kjeldahl Method
ASTM E147-61(2001) Standard Specification for Apparatus For Microdetermination Of Nitrogen By Kjeldahl Method

Japanese Industrial Standards Committee (JISC)

JIS H 1685:2000 Method for determination of nitrogen in tantalum

Canadian Standards Association (CSA)

CSA Z223.24-M1983-1983(R1999) Method for the Measurement of Nitric Oxide and Nitrogen Dioxide in Air

European Committee for Electrotechnical Standardization（CENELEC）

EN 61400-25-1:2017 Wind energy generation systems - Part 25-1: Communications for monitoring and control of wind power plants - Overall description of principles and models
EN 61400-25-1:2007 Fertilizers - Determination of cyanamide nitrogen

SE-SIS

SIS SS 18 71 63-1984 Coal - Determination of nitrogen - Macro Kjeldahl method
SIS 11 70 09-1975 Determination of nitriding depth in steel

Association of German Mechanical Engineers

VDI 2456 Blatt 2-1973 Gaseous emission measurement; determination of the total sum of nitrogen monoxide and nitrogen dioxide; acidimetric titration method

Others: The earliest Kjeldahl nitrogen analyzer abroad,What does the azotometer detect?,Azotometer's,Determination of crude protein content in addition to Kjeldahl,The principle of determination of crude protein content by Kjeldahl method,Determination of crude protein Kjeldahl method,Azotometer for nitrogen determination,Determination of protein Micro Kjeldahl method,Determination of crude protein semi-micro Kjeldahl method,Determination of total nitrogen Kjeldahl,Determination of nitrogen in soil,The Principle of Determination of Organic Nitrogen by Kjeldahl Method,Determination of crude protein Kjeldahl method,The principle of determination of crude protein content by Kjeldahl method,Determination method of Kjeldahl method,Determination of protein Kjeldahl method,The principle of determination of crude protein by Kjeldahl method,Calculation of Determination of Protein by Kjeldahl Method,Determination of azotometer,Calculation of Determination of Protein Content by Kjeldahl Method