Total nitrogen solid detection method

Total nitrogen solid detection method, Total:195 items.

The international standard classification for "Total nitrogen solid detection method" includes: Solid fuels , Fertilizers , Chemical reagents , Aerospace engines and propulsion systems , Rubber and plastics products in general .

The Chinese standard classification for "Total nitrogen solid detection method" includes: Hydrogeological survey , Coal analysis methods , Chemical fertilizer and chemical soil conditioner , Chemical reagent in general , Basic standards and general methods on chemical fertilizers , Spacecraft power system , Carbon black .

Jilin Provincial Standard of the People's Republic of China

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

Professional Standard - Geology

DZ/T 0064.9-1993 Groundwater quality test methods - the determination of total dissolved solid

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

GB/T 609-1988 Chemical reagent-General method for the determination of total nitrogen
GB/T 609-2018 Chemical reagent—General method for the determination of total nitrogen
GB/T 609-2006 Chemical Reagent - General Method for the Determination of Total Nitrogen
GB/T 2441.1-2008 Determination of urea - Part 1: Total nitrogen content
GB/T 30728-2014 Determination of nitrogen in solid biofuels
GB/T 2441.1-2001 Determination of urea-Determination of total nitrogen content

Professional Standard - Urban Construction

CJ 26.27-1991 Municipal sewage water quality inspection method standard Determination of total nitrogen Titration method after distillation
CJ 26.5-1991 Municipal sewage water quality inspection method Standard gravimetric method for total solids

Professional Standard - Agriculture

JAP-031 Azaphenanthridine detection method
222药典三部-2020 Content Determination Method 3101 Total Solids Determination Method
GB/T 609-2018(XG1-2024) Chemical Reagents General Method for Determination of Total Nitrogen
GB 4845-1984 Methods of determination for helium
GB 609-1988 General method for the determination of total nitrogen content of chemical reagents

Taiwan Provincial Standard of the People's Republic of China

CNS 3944-1976 Method for Determination of Total Kjeloahl Nitrogen in Polluted and Waste Water
CNS 3448-2007 Method of test for milk and milk products - Determination of total solids

Group Standards of the People's Republic of China

T/CMA HG101-2023 calibration method for gas detectors and alarms of nitric oxide, nitrogen dioxide (measuring range 0 μmol/mol～500 μmol/mol) for mining
T/QAS 071-2021 Determination of total nitrogen in brine Kjeldahl method
T/NAIA 044-2021 Urine Total Nitrogen Determination in Livestock Kjeldahl Method

Professional Standard - Coal

MT/T 279-1994 Method for determination of harmful gas nitrogen oxides in mine air (detection tube method)
MT 279-1994 Harmful Gas Existing in Mine Air Detection Method of Nitrogen Oxide（Detector Tube Method）

Hebei Provincial Standard of the People's Republic of China

DB13/T 1224-2010 Determination method of total nitrogen in organic chemical products

Professional Standard - Commodity Inspection

SN/T 2115-2008 Determination of the total nitrogen content and calculation of the crude protein content in food and feed for import and export - Combustion according to the Dumas principle

Professional Standard - Non-ferrous Metal

YS/T 587.15-2023 Calcined coke for prebaked blocks— Part 15: Determination of total carbon,hydrogen and nitrogen contents

Professional Standard - Aerospace

QJ 3182-2003 Leak detection method for general assembly of liquid propellant rocket engine

Professional Standard - Chemical Industry

HG/T 2299-2001 Determination of total solid content of aqueous dispersion - Rubber compounding material

SCC

BS DD ISO/TS 12902:2002 Solid mineral fuels. Determination of total carbon, hydrogen and nitrogen. Instrumental methods
SN-CEN/TS 15104:2005 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen — Instrumental methods
NS-EN 15104:2011 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen — Instrumental methods
DANSK DS/CEN/TS 15104:2005 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
DIN CEN/TS 15104:2005 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods; German version CEN/TS 15104:2005
DIN 51732 E:2013 Draft Document - Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
DIN EN 15104 E:2010 Draft Document - Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods; German version FprEN 15104:2010
10/30219384 DC BS EN 15104. Solid biofuels. Determination of total content of carbon, hydrogen and nitrogen. Instrumental methods
DANSK DS/ISO 29541:2010 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental method
VDI 2456-2004 Measurement of gaseous emissions — Reference method for the determination of the sum of nitrogen monoxide and nitrogen dioxide — Ion chromatographic method
09/30181371 DC BS ISO 29541. Solid mineral fuels. Determination of total carbon, hydrogen and nitrogen content. Instrumental method
VDI 2456-2004 Measurement of gaseous emissions — Reference method for the determination of the sum of nitrogen monoxide and nitrogen dioxide — Ion chromatographic method
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
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 ISO 16948:2015 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015)
DANSK DS/EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015)
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
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
13/30275855 DC BS EN ISO 16948. Solid biofuels. Determination of total content of carbon, hydrogen and nitrogen
SN-CEN/TS 15407:2006 Solid recovered fuels — Method for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
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 15407:2006 Solid recovered fuels - Method for the determination of carbon (C), hydrogen (H) and nitrogen (N) content; German version CEN/TS 15407:2006
BS 6057-3-3.2:1987 Rubber latices. Methods of test-Determination of total solids content
NS-EN 15407:2011 Solid recovered fuels — Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
DANSK DS/EN 15407:2011 Solid recovered fuels – Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
DIN EN ISO 16948 E:2013 Draft Document - Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen contents (ISO/DIS 16948:2013); German version prEN ISO 16948:2013
BS DD ISO/TS 11725:2002 Solid mineral fuels. Determination of nitrogen. Semi-micro gasification method

German Institute for Standardization

DIN 51732 E:2013-07 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
DIN 51732:2007 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
DIN 51732:2014 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
DIN 51732:2014-07 Testing of solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods
DIN 51700:2003 Testing of solid fuels - Generalities and index of methods of test
DIN EN ISO 16948:2015-09 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015); German version EN ISO 16948:2015
DIN EN 15104:2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods; German version EN 15104:2011
DIN 51722-1:1990 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
DIN EN ISO 16948 E:2013-03 Determination of total carbon, hydrogen and nitrogen content of solid biofuels (draft)
DIN 51722-1:1990-07 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
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 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

Standard Association of Australia （SAA）

AS 1871.11:1976 List of methods for examination of waters Nitrogen (total Kjeldahl incl. ammoniacal)
AS 2300.1.2.2:1988 Methods of chemical and physical testing for the dairying industry - General methods and principles - Determination of nitrogen - Nitrogen fractions from milk

British Standards Institution (BSI)

BS DD CEN/TS 15104:2006 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
BS DD CEN/TS 15104:2005 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen — Instrumental methods
BS ISO 29541:2010 Solid mineral fuels. Determination of total carbon, hydrogen and nitrogen content. Instrumental method
BS EN 15104:2011 Solid biofuels. Determination of total content of carbon, hydrogen and nitrogen. Instrumental methods
BS EN ISO 16948:2015 Solid biofuels. Determination of total content of carbon, hydrogen and nitrogen
DD ISO/TS 12902:2002 Solid mineral fuels. Determination of total carbon, hydrogen and nitrogen. Instrumental methods
BS DD CEN/TS 15407:2006 Solid recovered fuels - Method for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
BS 7755-3.7:1995 Soil quality. Chemical methods. Determination of total nitrogen. Modified Kjeldahl method
BS EN 15407:2011 Solid recovered fuels. Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
DD CEN/TS 15407:2006 Solid recovered fuels — Method for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
BS 5551-4.1.3:1986 Fertilizers. Chemical analysis. Determination of nitrogen. Method for determination of total nitrogen content (titrimetric method after distillation)
BS 4267-2:1988 Ammonium nitrate - Method for determination of total nitrogen content
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 EN 15750:2010 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods

RU-GOST R

GOST R 54216-2010 Solid biofuels. Determination of total content of carbon, hydrogen and nitrogen by instrumental methods
GOST 32985-2014 Solid biofuels. Determination of carbon, hydrogen and nitrogen by instrumental methods
GOST 28743-1990 Coal. Determination of nitrogen. Semi-micro Kjeldahl method
GOST 28743-1993 Solid mineral fuel. Methods for determination of nitrogen
GOST 10671.4-2016 Reagents. Methods for determination of total nitrogen impurity
GOST R 54234-2010 Solid recovered fuels. Determination of carbon, hydrogen and nitrogen content by instrument methods
GOST 26107-1984 Soils. Methods for determination of total nitrogen
GOST 32979-2014 Solid mineral fuel. Instrumental method for determination of carbon, hydrogen and nitrogen
GOST 18164-1972 Drinking water. Method for determination of total solids content
GOST 33977-2016 Fruit and vegetable products. Methods for determination of total solids content
GOST R 52911-2008 Solid mineral fuels. Methods for determination of total moisture
GOST R 56885-2016 Biomass. Determination of total amount of solids by standard method
GOST 26715-1985 Organic fertilizers. Methods for determination of total nitrogen
GOST ISO 6734/IDF 15-2012 Sweetened condenced milk. Determination of total solids content (Reference method)
GOST R 54244-2010 Solid mineral fuel. Instrumental method for determination of carbon, hydrogen and nitrogen

Spanish Association for Standardization (UNE)

UNE-CEN/TS 15104:2008 EX Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
UNE-EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015)
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-EN 15407:2011 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
UNE 34080:1974 ANALYSIS METHODS FOR CHOCOLATES. DETERMINATION OF TOTAL NITROGEN. (PROTEINS).
UNE-EN ISO 21663:2021 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020)

HU-MSZT

MSZ 21976/8-1982 Inspection of solid waste in residential areas, determination of total nitrogen, phosphorus, and calcium content
MSZ 9279/8-1980 Fine chemicals testing methods. Nitrogen pollution detection
MSZ 21862/5-1976 How to test nitrogen dioxide gas

GOST

GOST R 50255-1992 Solid mineral fuels. Methods for the determination of nitrogen
GOST 2059-1975 Brown coals, hard coals, anthracites and combustible shales. Accelerated method for the determination of total sulphur content
GOST 2408.2-1975 Brown coals, hard coals, anthracite, combustible shales and turf. Method for thedetermination of nitrogen content

GSO

BH GSO ISO 29541:2016 Solid mineral fuels -- Determination of total carbon, hydrogen and nitrogen content -- Instrumental method
OS GSO ISO 29541:2014 Solid mineral fuels -- Determination of total carbon, hydrogen and nitrogen content -- Instrumental method
GSO ISO 29541:2014 Solid mineral fuels -- Determination of total carbon, hydrogen and nitrogen content -- Instrumental method
GSO 1724:2005 Testing aggregates – Methods of sampling
GSO 1149:2002 Test methods of nitrous oxide gas for medical purposes.
GSO 2404:2014 GASES – MEDICAL NITROGEN GAS –TEST METHODS
BH GSO 2404:2015 GASES – MEDICAL NITROGEN GAS –TEST METHODS

International Organization for Standardization (ISO)

ISO 29541:2010 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental 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 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen
ISO 6734:2010 Sweetened condensed milk - Determination of total solids content (Reference method)

South African Bureau of Standard

SANS 12902:2007 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen - Instrumental methods

European Committee for Standardization (CEN)

EN 15104:2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015)
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 21663:2020 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental method (ISO 21663:2020)
EN 15407:2011 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content

Danish Standards Foundation

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
DS/EN 15407:2011 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
DS/ISO 21663:2020 Solid recovered fuels – Methods for the determination of carbon (C), hydrogen (H), nitrogen (N) and sulphur (S) by the instrumental 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

Lithuanian Standards Office

LST EN 15104-2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods
LST EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (ISO 16948:2015)
LST 1611-2000 Confectionery. Methods for determination moisture and total solids content
LST EN 15407-2011 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
LST EN 15750-2010 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods

CEN - European Committee for Standardization

PD CEN/TS 15104:2005 Solid biofuels - Determination of total content of carbon@ hydrogen and nitrogen - Instrumental methods
PD CEN/TS 15407:2006 Solid recovered fuels - Method for the determination of carbon (C)@ hydrogen (H) and nitrogen (N) content

Association Francaise de Normalisation

NF X34-117:2011 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen - Instrumental methods.
NF X34-117*NF EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen
NF EN ISO 16948:2015 Solid biofuels - Determination of total carbon, hydrogen and nitrogen content
NF A06-555:2010 Steel - Determination of nitrogen content - Spectrophotometric method.
NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
NF X34-220:2011 Solid recovered fuels - Methods for the determination of carbon (C), hydrogen (H) and nitrogen (N) content.
NF M03-018:2003 Solid mineral fuels - Determination of nitrogen.

GOSTR

GOST R 58596-2019 Soils. Methods for determination of total nitrogen

YU-JUS

JUS H.B8.288-1983 Fertilizers. Determination of content total-nitrogen. Volumetric method

TN-INNORPI

NT AB 019-1970 Algemene beproevings-en verificatiemethoden

Korean Agency for Technology and Standards (KATS)

KS M ISO 16948:2021 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen
KS E ISO 334:2018 Solid mineral fuels — Determination of total sulfur — Eschka method
KS H ISO 6734:2006 Sweetened condensed milk－Determination of total solids content(Reference method)

KR-KS

KS M ISO 16948-2021 Solid biofuels — Determination of total content of carbon, hydrogen and nitrogen
KS E ISO 334-2018 Solid mineral fuels — Determination of total sulfur — Eschka method

Indonesia Standards

SNI 4146-2013 Method for determination of total nitrogen content in sediment by Kjeldahl titration method
SNI 06-2413-2002 Test methods for solid matter content in water
SNI 19-1501-1989 Test methods for total nitrogen oxide in air

American Society for Testing and Materials (ASTM)

ASTM RR-D19-1194 2016 D8083-Test Method for Total Nitrogen, and Total Kjeldahl Nitrogen (TKN) by Calculation, in Water by High Temperature Catalytic Combustion and Chemiluminescence Detection
ASTM D8083-16 Standard Test Method for Total Nitrogen, and Total Kjeldahl Nitrogen (TKN) by Calculation, in Water by High Temperature Catalytic Combustion and Chemiluminescence Detection
ASTM E3351-22 Standard Test Method for Detection of Nitric Oxide Production In Vitro
ASTM D8083-16(2023) Standard Test Method for Total Nitrogen, and Total Kjeldahl Nitrogen (TKN) by Calculation, in Water by High Temperature Catalytic Combustion and Chemiluminescence Detection
ASTM D8001-16 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D8001-16e1 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D3590-02 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-11 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-17 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM E1756-95 Standard Test Method for Determination of Total Solids in Biomass
ASTM E1756-01 Standard Test Method for Determination of Total Solids in Biomass
ASTM D5176-91(2003) Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis and Chemiluminescence Detection
ASTM D5176-91(1995) Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis and Chemiluminescence Detection
ASTM D1013-93(1998) Standard Test Method for Determining Total Nitrogen in Resins and Plastics
ASTM D5176-08 Standard Test Method for Total Chemically Bound Nitrogen in Water by Pyrolysis and Chemiluminescence Detection
ASTM E1756-24 Standard Test Method for Determination of Total Solids in Biomass
ASTM RR-D19-1185 2010 D5907-Test Methods for Filterable Matter (Total Dissolved Solids) and Nonfilterable Matter (Total Suspended Solids) in Water
ASTM D5907-18 Standard Test Methods for Filterable Matter (Total Dissolved Solids) and Nonfilterable Matter (Total Suspended Solids) in Water

Japanese Industrial Standards Committee (JISC)

JIS K 0170-3:2019 Testing methods for water quality by flow analysis -- Part 3: Total nitrogen
JIS K 0170-3:2011 Testing methods for water quality by flow analysis -- Part 3: Total nitrogen
JIS K 0102-2:2022 Testing methods for industrial water and industrial wastewater -- Part 2: Inorganic anions, ammonium ion, organic nitrogen, total nitrogen and total phosphorus

PL-PKN

PN G04523-1992 Solid fuels. Determination of nitrogen by the Kjeldahl method
PN C04576 ArkusZ12-1973 Water and waste water Tests for nitrogenDetermination of total nitrogen of Kjeldahl

Canadian Standards Association (CSA)

CAN/CSA-ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen (First Edition)

IN-BIS

IS 11622-1986 Method for determination of total solids content in condensed milk

VDI - Verein Deutscher Ingenieure

VDI 2456-2003 Stationary source emissions - Determination of the total of nitrogen monoxide and nitrogen dioxide - Ion chromatography method
VDI 2456 Blatt 2-1973 Gaseous emission measurement; determination of the total sum of nitrogen monoxide and nitrogen dioxide; acidimetric titration method
VDI 2456 Blatt 1-1973 Gaseous emission measurement; determination of the total sum of nitrogen monoxide and nitrogen dioxide; phenoldisulfonic acid method
VDI 2456 Blatt 10-1990 Gaseous emission measurement; analytical determination of the sum of nitrogen monoxide and nitrogen dioxide; dimethylphenol method

RO-ASRO

STAS 6417-1973 SOLID FUELS Determination of nitrogen

CZ-CSN

CSN 57 0106 Cast.3-1984 Methods for testing oí frozen milk products. Determination of total solids content.
CSN 44 1356-1962 Solid Fuels. Determination of Nitrogen
CSN 65 4836-1983 Minerál fertilizers Methode for determination of total nitrogen content

VN-TCVN

TCVN 6498-1999 Soil quality.Determination of total nitrogen.Modifierd Kejldahl method
TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content

PH-BPS

PTS 98-1970 Standardization of the Method of Test for the Determination of Total Nitrogen Content.Devarda Method

Association of Official Analytical Chemists (AOAC)

AOAC 991.20 AOAC Official Method 991.20 Nitrogen (Total) in Milk Kjeldahl Methods

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