Determination of total nitrogen content by spectrophotometry

Determination of total nitrogen content by spectrophotometry, Total:273 items.

The international standard classification for "Determination of total nitrogen content by spectrophotometry" includes: Non-metalliferous minerals , Ferroalloys , Ferrous metals in general , Iron ores , Farming and forestry in general , Cereals, pulses and derived products , Magnesium and magnesium alloys , Spices and condiments , Metalliferous minerals , Natural gas , Aluminium and aluminium alloys , Cadmium, cobalt and their alloys , Fertilizers , Pharmaceutics , Latex and raw rubber , Materials for the reinforcement of composites , Chromium ores , Chemical analysis of metals , Materials for aerospace construction , Petroleum products in general , Salts .

The Chinese standard classification for "Determination of total nitrogen content by spectrophotometry" includes: Metallurgical auxiliary material ore , Steel and iron alloy analysis method , Iron ore , Animal husbandry in general , Cereal crop and forage crop in general , Light metals and their alloys analysis method , Flavoring materials , Grease and oil processing and products , Natural gas , Heavy metals and their alloys analysis method , Chemical fertilizer and chemical soil conditioner , Basic standards and general methods on chemical fertilizers , Soil and fertilizer in general , Forestry chemical raw material , Basic standards and general methods for water treatment agent , Special carbon material , Chrome ore , Metal physical property test method .

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

GB/T 8220.2-1998 Methods for chemical analysis bismuth--Determination of iron content--1, 10-Phenanthroline photometric method
GB/T 5195.10-2006 Fluorspar - Determination of iron content - 1, 10-phenanthroline spectrophotometric method
GB/T 14849.1-2007 Methods for chemical analysis of silicon metal—Part 1:Determination of iron content—1 10-Phenanthrolion spectrophotometric method
GB/T 13748.9-2005 Chemical analysis methods of magnesium and magnesium alloys — Determination of iron content — Orthopenanthroline spectrophotometric method
GB/T 223.49-1994 Methods for chemical analysis of iron, steel and alloy Extraction separation-chlorophosphonazo mA spectrophotometric method for the determination of the total rare earth content
GB/T 6730.44-2017(英文版) Iron ore - Determination of zinc content - 1-(2-pyridyl azo)-2-naphthol spectrophotometric method
GB/T 6730.24-1986 Methods for chemical analysis of iron ores; The arsenazo 3 photometric method for the determination of rare earth elements content
GB/T 2441.2-2001 Determination of urea-Determination of biuret content-Spectrophotometric method
GB/T 4699.3-2007 Ferrochromium silicochromium and nitrogen-bearing ferrochromium—Determination of phosphorus content—Molybdobismuthylphosphoric blue spectrophotometric method and the molybdenum blue s
GB/T 20574-2006 Method for determination of total flavonoids in propolis - Colorimetric method
GB/T 11060.8-2012 Natural gas - Determination of sulfur compound - Part 8：Determination of total sulfur content by Ultraviolet fluorescence method
GB/T 11894-1989 Water quality--Determination of total nitrogen--Alkaline potassium persulfate digestion-UV spectro photometric method
GB/T 20931.9-2007 Methods for chemical analysis of lithium—Determination of nitrogen content—Mercuric potassium iodide spectrophotometric method
GB/T 5686.4-2022 Ferromanganese, ferromanganese-silicon, nitrogen-bearing ferromanganese and manganese metal—Determination of phosphorus content—Molybdenum blue spectrophotometric method and bismuth phosphomolybdate blue spectrophotometric method
GB 7630-1987 The tribromoarsenazo photometric method for the determination of rare earth oxide content in rice and wheat
GB/T 6730.24-2006 Iron ores - Determination of total rare earth contents - Chlorophosphonazo mA spectrophotometric method
GB/T 6730.89-2024 Iron ores—Determination of thorium content—Arsenazo Ⅲ spectrophotometric method
GB/T 6730.73-2016(英文版) Iron ores—Determination of total iron content—EDTA photometric titration method
GB/T 24583.5-2019(英文版) Determination of phosphorus content in vanadium-nitrogen alloys - Bismuth phosphomolybdenum blue spectrophotometric method
GB/T 8704.7-2009 Ferrovanadium—Determination of phosphorus content—The molybdenum blue photometric method
GB/T 7717.8-1994 Acrylonitrile - Determination of total aldehydes
GB/T 17528-1998 Determination of piperine content--Spectrophotometric method
GB/T 24583.5-2009 Vanadium-Nitrogen alloy—Determination of phosphorus content—The bismuth molybdenum blue spectrophotometry method
GB/T 7630-1987 The tribromoarsenazo photometric method for the determination of rare earth oxide content in rice and wheat
GB/T 5059.6-2007 Ferromolybdenum—Determination of phosphorus content—Molybdobismuthylphosphoric blue spectrophotometric method and the molybdenum blue spectrophotometrc method
GB/T 13748.9-2013 Chemical analysis methods of magnesium and magnesium alloys—Part 9:Determination of iron content—Orthopenanthroline spectrophotometric method
GB/T 30389-2013 Chillies and Chilli Oleoresins - Determination of Total Capsaicinoid Content - Spectrophotometric Methods
GB/T 223.70-2008 Iron steel and alloy - Determination of iron contents - O-phenanthroline spectrophotometric method
GB/T 4702.7-2016 Chromium metal─Determination of nitrogen content─Distillation-nessler reagent spectrophotometric method

Professional Standard - Agriculture

NY/T 2332-2013 Determination of total sugars in red ginseng—Spectrophotometry
GB 6260-1986 Determination of rare earth oxide content in soil--Chlorophosphonazo-p-hippuric acid photometric method
NY/T 30-1986 Determination of rare earth oxide content in soil - Chlorophonazo - P - Hippuric acid photometric method
NY/T 1116-2006 Fertilizers - Determination of nitrate nitrogen content - Ultraviolet spectro - Photometric method

Group Standards of the People's Republic of China

T/ZCSIA 7-2023 Spectrophotometric method for determination of total phenolic content in large cherries and their products
T/ZJATA 0025-2024 Water quality Total nitrogen determination Prefabricated chromotropic acid reagent spectrophotometry
T/ZCSIA 8-2023 Determination of total polyphenol content in sweet potato leaves by spectrophotometric method
T/HNNMIA 91-2023 Bauxite-Determination of vanadium content-Spectrophotometric method
T/YNRZ 011-2024 The Determination of Total Amino Acids in Coffee beans With Spectrophotometry
T/ZCSIA 9-2023 Determination of total flavonoid content in strawberries and their products by spectrophotometric method
T/NAIA 097-2021 Determination of total phenolic content in Lycium barbarum by spectrophotometric method

工业和信息化部

YB/T 4582.6-2017 Ferrosilicon nitride-Determination of manganese content-Sodium periodate spectrophotometric method
YB/T 4566.6-2016 Ferrovanadium nitride. Determination of phosphorus content. Molybdobismuthylphosphoric blue spectrophotometric method
YB/T 4582.2-2017 Ferrosilicon nitride. Determination of chromium content. Diphenylcarbonhydrazide spectrophotometric method
YB/T 4582.3-2017 Ferrosilicon nitride-Determination of phosphorus content-Bismuth phosphomolybdate blue spectrophotometric method
YB/T 4582.9-2017 Ferrosilicon nitride. Determination of titanium content. Diantipyrylmethane spectrophotometric method

农业农村部

NY/T 3676-2020 Determination of total triterpene in ganoderma- Spectrophotometric method

国家市场监督管理总局、中国国家标准化管理委员会

GB/T 24583.5-2019 Vanadium-nitrogen—Determination of phosphorus content—Bismuth molybdenum blue spectrophotometric method
GB/T 223.37-2020 Iron, steel and alloy—Determination of nitrogen content—Indophenol blue spectrophotometric method after distillation separation
GB/T 11060.8-2020 Natural gas—Determination of sulfur compounds—Part 8:Determination of total sulfur content by ultraviolet fluorescence method
GB/T 39544-2020 Natural rubber latex concentrate—Determination of total phosphate content—Spectrophotometric method

Professional Standard - Chemical Industry

HG/T 4327-2012 Reclaimed water—Determination of total iron content—Spectrophotometric method

Ningxia Provincial Standard of the People's Republic of China

DB64/T 1515-2017 Determination of Total Glucosides in Sheep Placenta Capsules by Ultraviolet Spectrophotometry
DB64/T 1082-2015 Determination of total flavonoids content in wolfberry - spectrophotometric colorimetry

Professional Standard - Ferrous Metallurgy

YB/T 190.8-2014 Continuous casting powder--The determination of iron content . The o-phenanthroline spectrophotometric method and the flame atomic absorption method
YB/T 5330-2009 Vanadium pentoxid - Determination of iron content-The ortho-phenanthroline spectrophotome method
YB/T 5191-2007 High pure graphite meterials - Determination of total race earths content - Spectrophotometric method
YB/T 5191-1993 High pure graphite meterials―Determination of total race earths content―Spectrophotometric method
YB/T 505.5-2007 Vanadium and Titanium Slag - Determination of Ferric Oxide Content - Photometric Method

Professional Standard - Aviation

HB 5220.48-1995 Superalloy Chemical Analysis Method Water Steam Distillation - Volumetric Method (or Absorptiometry) Determination of Nitrogen Content
HB 5220.36-1995 Determination of Zirconium Content by Arsenazo Ⅲ Direct Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5220.43-1995 Determination of Lanthanum Content by DBC-Arsenazo Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5219.19-1998 Methods for Chemical Analysis of Magnesium Alloy - Determination of Cerium Content with Tribromo Arsenazo Spectrophotometric Method
HB 5220.39-1995 Chemical Analysis Method of Superalloys PMBP Direct Extraction-ArsenazoⅢ Absorbance Spectrophotometry Determination of Total Rare Earth
HB 5220.48-2008 Methods for Chemical Analysis of Superalloys - Part 48: Determination of Nitrogen Content by Water Vapour Distillation-Volumetric Method(Or Photometric Method)
HB 5297.20-2001 Methods for Chemical Analysis of Titanium Alloys - Determination of Cerium Content by Chlorophosphonazo III Spectrophotometric Method
HB 5220.42-1995 Determination of Cerium Content by DBC-Arsenazo Absorption Spectrophotometry Method for Chemical Analysis of Superalloys
HB 5297.17-2001 Methods for Chemical Analysis of Titanium Alloys - Determination of Zirconium Content by Arsenazo iii Photometric Method
HB 5422.23-1989 Chemical Analysis Methods for Copper Alloy - Arsenazo III Absorption Photometry for the Determination of Zirconium Content
HB 5220.43-2008 Methods for Chemical Analysis of Superalloys - Part 43: Determination of Lanthanum Content by Dbc-Arsenazo Photometric Method
HB 5220.42-2008 Methods for Chemical Analysis of Superalloys - Part 42: Determination of Cerium Content by Dbc-Arsenazo Photometric Method
HB 5220.38-1995 Extraction and Separation by Chemical Analysis Method of Superalloy - Determination of Cerium Content by ArsenazoⅢ Absorbance Spectrophotometry

Heilongjiang Provincial Standard of the People's Republic of China

DB23/T 1382-2010 Spectrophotometric method for determination of urea content in feed
DB23/T 2963-2021 Determination of Trace Calcium Content in Natural Flake Graphite by Calcium-Arsenazo Ⅲ Spectrophotometric Method

Taiwan Provincial Standard of the People's Republic of China

CNS 14573-2001 Starches and derived products－Determination of total phosphorus content－Spectrophotometric method

Anhui Provincial Standard of the People's Republic of China

DB34/T 2743-2016 Spectrophotometric method for determination of total flavonoids content in Huai Mi and its products

中华人民共和国国家质量监督检验检疫总局、中国国家标准化管理委员会

GB/T 5195.6-2017 Fluorspar - Determination of phosphorus content - Photometric method
GB/T 6730.44-2017 Iron ores―Determination of zinc content―1-(2-pyridylazo)-2-naphthol spectrophotometric method

未注明发布机构

DIN EN ISO 4945 E:2018-01 Determination of steel nitrogen by spectrophotometry (draft)

Professional Standard - Petrochemical Industry

SH/T 0020-1990 Determination of phosphorus content in gasoline (Spectrophotometric method)
SH/T 0683-1999 Standard test method for rhenium in reforming catalysts - Spectrophotometry

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 - Non-ferrous Metal

YS/T 536.2-2006 Bismuth Chemical Analysis Method 1,10-Phenanthroline Spectrophotometric Determination of Iron Content
YS/T 535.4-2009 Chemical analysis methods of sodium fluoride—Part 4:Determination of iron content—1,10-phenanthroline spectrophotometric method
YS/T 74.7-1994 Cadmium Chemical Analysis Method 1,10-Phenanthroline Spectrophotometric Determination of Iron Content

Professional Standard - Environmental Protection

HJ 1191-2021 Water quality—Determination of azide—Spectrophotometry
HJ 667-2013 Water quality-Determination of total nitrogen by continuous flow analysis(CFA) and N-(1-naphthyl)ethylene diamine dihydrochloride
HJ 668-2013 Water quality-Determination of total nitrogen by flow injection analysis（FIA）and N-(1-naphthyl)ethylene diamine dihydrochloride spectrophotometry
HJ 636-2012 Water quality. Determination of total nitrogen. Alkaline potassium persulfate digestion UV spectrophotometric method

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

DB15/T 3364-2024 Determination of polysaccharide content in Artemisia annua seeds Spectrophotometric method

Shandong Provincial Standard of the People's Republic of China

DB37/T 3314-2018 Determination of Alginic Acid Content in Fertilizer by Spectrophotometry

Professional Standard - Water Conservancy

SL 84-1994 Determination of nitrogen(nitrate) (Ultraviolet spectrophtometric method)

Professional Standard - Nuclear Industry

EJ/T 20167-2018 Determination of nitrogen content in reprocessed uranium trioxide powder by distillation-Nessler reagent spectrophotometry

European Committee for Standardization (CEN)

EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
EN 10179:1989 Chemical Analysis of Ferrous Materials - Determination of Nitrogen (Trace Mounts) in Steel Spectrophotometric Method

International Organization for Standardization (ISO)

ISO 4945:1977 Steel; Determination of nitrogen content; Spectrophotometric method
ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
ISO 2991:1974 Nitric acid for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
ISO 6491:1980 Animal feeding stuffs; Determination of total phosphorus content; Spectrophotometric method
ISO 5378:1978 Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Spectrophotometric method
ISO 3946:1982 Starches and derived products; Determination of total phosphorus content; Spectrophotometric method
ISO 6607:1985 Aluminium ores; Determination of total silicon content; Combined gravimetric and spectrophotometric method
ISO 2899:1974 Sulphuric acid and oleums for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
ISO 1053:1975 Zinc; Determination of copper content; Spectrophotometric method
ISO 19043:2023 Natural rubber latex concentrate — Determination of total phosphate content by spectrophotometric method
ISO 5400:1984 | IULTCS Leather — Determination of total silicon content — Reduced molybdosilicate spectrometric method
ISO/TS 21826:2020 Iron ores — Determination of total iron content — EDTA photometric titration method
ISO 9441:1988 Steel; determination of niobium content; PAR spectrophotometric method
ISO 17058:2004 Steel and iron - Determination of arsenic content - Spectrophotometric method
ISO 19043:2015 Natural rubber latex concentrate - Determination of total phosphate content by spectrophotometric method
ISO 4941:1994 Steel and iron - Determination of molybdenum content - Thiocyanate spectrophotometric method
ISO 3886:1977 Iron ores — Determination of manganese content — Spectrophotometric method
ISO 7834:1987 Iron ores; Determination of arsenic content; Molybdenum blue spectrophotometric method
ISO 10153:1997 Steel - Determination of boron content - Curcumin spectrophotometric method

CEN - European Committee for Standardization

EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method

German Institute for Standardization

DIN EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977); German version EN ISO 4945:2009
DIN EN 10179:2023-07 Steels - Determination of nitrogen (trace amounts) - Spectrophotometric method; German and English version prEN 10179:2023 / Note: Date of issue 2023-05-26*Intended as replacement for DIN EN 10179 (1990-04).
DIN EN ISO 5378:1994-10 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978); German version EN ISO 5378:1994
DIN EN ISO 4945:2019-03 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018); German version EN ISO 4945:2018
DIN ISO 3946:1986 Starches and derived products; determination of the total phosphorus content; spectrophotometric method; identical with ISO 3946, edition 1982
DIN EN ISO 4945:2019 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)

Danish Standards Foundation

DS/EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
DS/EN ISO 5378:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophometric method
DS 285:1990 Water qulity. Total arsenic content. Spectrophotometric method
DS/EN 10179:1989 Chemical analysis of ferrous materials. Determination of nitrogen (trace amount) in steels. Spectrophotometric method
DS/EN ISO 3946:1995 Starches and derived products - Determination of total phosphorus content - Spectrophometric method
DS 292:1985 Water analysis. Total phosphor. Photometric method
DS 291:1985 Water analysis. Phosphate. Photometric method
DS/EN 26595:1993 Water quality. Determination of total arsenic. Silver diethyldithiocarbamate spectrophotometric method

Korean Agency for Technology and Standards (KATS)

KS D ISO 4945:2002 Steel－Determination of nitrogen content－Spectrophotometric method
KS D ISO 4945-2002(2017) Steel－Determination of nitrogen content－Spectrophotometric method
KS H ISO 5378-2023 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 5378-2008(2018) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 5378:2008 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 3946-2008(2018) Starches and derived products－Determination of total phosphorus content－Spectrophotometric method
KS H ISO 3946-2023 Starches and derived products－Determination of total phosphorus content－Spectrophotometric method
KS E ISO 6607:2011 Aluminium ores－Determination of total silicon content－Combined gravimetric and spectrophotometric method
KS H ISO 3946:2008 Starches and derived products－Determination of total phosphorus content－Spectrophotometric method
KS E ISO 6607:2021 Aluminium ores — Determination of total silicon content —Combined gravimetric and spectrophotometric method
KS M ISO 5400-2012(2017) Leather－Determination of total silicon content－Reduced molybdosilicate spectrometric method
KS D ISO 1053-2002(2007) Zinc－Determination of copper content?Spectrophotometric method
KS D ISO 1053-2012 Zinc－Determination of copper content?Spectrophotometric method
KS D ISO 17058:2005 Steel and iron－Determination of arsenic content－ Spectrophotometric method
KS D ISO 9441-2022 Steel－Determination of niobium content－PAR spectrophotometric method
KS D ISO 17058:2020 Steel and iron — Determination of arsenic content —Spectrophotometric method
KS E ISO 6607-2011(2016) Aluminium ores－Determination of total silicon content－Combined gravimetric and spectrophotometric method
KS E ISO 8556:2001 Aluminium ores－Determination of phosphorus content－Molybdenum blue spectrophotometric method
KS E ISO 9683-1:2010 Iron ores－Determination of vanadium－Part 1：BPHA spectrophotometric method
KS D ISO 629:2008 Steel and cast iron－Determination of manganese content－Spectrophotometric method
KS D ISO 4829-2:2005 Steel and iron－Determination of total silicon content－Reduced molybdosilicate spectrophotometric method－Part 2：Silicon contents between 0.01 and 0.05 %
KS D ISO 629-2023 Steel and cast iron－Determination of manganese content－Spectrophotometric method

GSO

OS GSO ISO 4945:2015 Steel -- Determination of nitrogen content -- Spectrophotometric method
GSO ISO 6491:2005 ANIMAL FEEDING STUFFS – DETERMINATION OF TOTAL PHOSPHORUS CONTENT – SPECTROPHOTOMETRIC METHOD
GSO ISO 5378:2015 Starches and derived products -- Determination of nitrogen content by the Kjeldahl method -- Spectrophotometric method
OS GSO ISO 6491:2005 ANIMAL FEEDING STUFFS – DETERMINATION OF TOTAL PHOSPHORUS CONTENT – SPECTROPHOTOMETRIC METHOD
GSO ISO 13730:2014 Meat and meat products -- Determination of total phosphorus content -- Spectrometric method
GSO ISO 4945:2015 Steel -- Determination of nitrogen content -- Spectrophotometric method
NB/T 11531-2024 Determination of total phosphorus, ammonia nitrogen and permanganate index in coal mine water - Flow injection-spectrophotometry
OS GSO ISO 3946:2015 Starches and derived products -- Determination of total phosphorus content -- Spectrophotometric method
GSO ISO 3946:2015 Starches and derived products -- Determination of total phosphorus content -- Spectrophotometric method
GSO ISO 5400:2014 Leather -- Determination of total silicon content -- Reduced molybdosilicate spectrometric method
OS GSO ISO 19043:2017 Natural rubber latex concentrate -- Determination of total phosphate content by spectrophotometric method
OS GSO ISO 17058:2013 Steel and iron -- Determination of arsenic content -- Spectrophotometric method
GSO ISO 19043:2017 Natural rubber latex concentrate -- Determination of total phosphate content by spectrophotometric method
GSO ISO 17058:2013 Steel and iron -- Determination of arsenic content -- Spectrophotometric method
OS GSO ISO 9441:2015 Steel -- Determination of niobium content -- PAR spectrophotometric method
OS GSO ISO 10153:2015 Steel -- Determination of boron content -- Curcumin spectrophotometric method
BH GSO ISO 9208:2017 Aluminium ores - Determination of vanadium content -- BPHA spectrophotometric method

British Standards Institution (BSI)

BS EN ISO 4945:2010 Steel. Determination of nitrogen content. Spectrophotometric method
BS EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
BS EN ISO 3946:1994 Starches and derived products - Determination of total phosphorus content - Spectrometric method
BS EN ISO 4945:2018 Steel. Determination of nitrogen. Spectrophotometric method
23/30472739 DC BS EN 10179. Steels. Determination of nitrogen (trace amounts). Spectrophotometric method
BS ISO 17058:2004 Steel and iron - Determination of arsenic content - Spectrophotometric method
BS ISO 17058:2004(2008) Steel and iron — Determination of arsenic content — Spectrophotometric method
22/30446379 DC BS ISO 19043 Natural rubber latex concentrate. Determination of total phosphate content by spectrophotometric method
BS EN ISO 13395:1996 Water quality - Determination of nitrite nitrogen and nitrate nitrogen and the sum of both by flow analysis (CFA and FIA) and spectrometric detection
BS ISO 19043:2015 Natural rubber latex concentrate. Determination of total phosphate content by spectrophotometric method
BS EN ISO 5378:1994(1999) Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrometric method

SCC

DANSK DS/EN ISO 4945:2009 Steel – Determination of nitrogen content – Spectrophotometric method
UNE 36317-1:1985 DETERMINATION OF NITROGEN CONTENT OF STEELS. SPECTROPHOTOMETRIC METHOD
NS-EN 10179:2024 Steels - Determination of nitrogen (trace amounts) - Spectrophotometric method
NS-EN ISO 4945:2009 Steel — Determination of nitrogen content — Spectrophotometric method (ISO 4945:1977)
AENOR UNE-EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
SPC GB/T 24583.5-2019 Vanadium-nitrogen -- Determination of phosphorus content -- Bismuth molybdenum blue spectrophotometric method (TEXT OF DOCUMENT IS IN CHINESE)
DANSK DS/EN ISO 5378:1994 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophometric method
NS-EN ISO 5378:1994 Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrophotometric method (ISO 5378:1978)
DIN EN 10179 E:2023 Draft Document - Steels - Determination of nitrogen (trace amounts) - Spectrophotometric method; German and English version prEN 10179:2023
BS 5766-3:1981 Methods for analysis of animal feeding stuffs-Determination of total phosphorus content (spectrophotometric method)
DANSK DS/EN ISO 3946:1994 Starches and derived products - Determination of total phosphorus content - Spectrophometric method
BS 5697-2:1979 Methods of test for starch and its derivatives and by-products. Determination of nitrogen conteny by the Kjeldahl method ( spectrophotometric method)
BS PD ISO/TS 21826:2020 Iron ores. Determination of total iron content. EDTA photometric titration method
NS-EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)
NS-EN ISO 3946:1994 Starches and derived products — Determination of total phosphorus content — Spectrophotometric (ISO 3946:1982)
BS 7020-9.1:1988 Analysis of iron ores. Methods for the determination of manganese content-Spectrophotometric method

Association Francaise de Normalisation

NF A06-555:2010 Steel - Determination of nitrogen content - Spectrophotometric method.
NF T20-286:1982 Nitric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method.
NF V18-106:1980 Animal feeding stuffs. Determination of total phosphorus content. Spectrophotometric method.
NF V18-106*NF ISO 6491:2011 Animal feeding stuffs - Determination of phosphorus content - Spectrophotometric method
NF V03-608*NF EN ISO 5378:1994 Starches and derived products. Determination of nitrogen content by the kjeldahl method. Spectrophotometric method.
NF A06-323:1987 Chemical analysis of steels. Determination of nitrogen content. Molecular absorption spectrophotometric method.
NF V03-613*NF EN ISO 3946:1994 Starches and derived products. Determination of total phosphorus content. Spectrophotometric method.
NF A06-555*NF EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
NF T90-026:1993 Water quality - Determination of total arsenic - Silver diethyldithiocarbamate spectrophotometric method.
NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
NF EN ISO 3946:1994 Starches and derived products - Determination of total phosphorus content - Spectrophotometric method
NF T90-139*NF EN ISO 17852:2008 Water quality - Determination of mercury - Method using atomic fluorescence spectrometry
NF A20-430*NF ISO 7834:1988 Iron ores. Determination of arsenic content. Molybdenum blue spectrophotometric method.
NF T90-080:1997 Water quality - Determination of ammonium nitrogen by flow analysis (CFA and FIA) and spectrometric detection.
NF A20-423:1986 Iron ores. Determination of titanium content. Spectrophotometric determination.
NF A20-401:1985 Iron ores. Determination of phosphorus content. Spectrophotometric method.

AENOR

UNE-EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
UNE-EN ISO 5378:1995 STARCHES AND DERIVED PRODUCTS. DETERMINATION OF NITROGEN CONTENT BY THE KJELDHAL METHOD. SPECTROPHOTOMETRIC METHOD. (ISO 5378:1978).
UNE-EN ISO 3946:1995 STARCHES AND DERIVED PRODUCTS. DETERMINATION OF TOTAL PHOSPHORUS CONTENT. SPECTROPHOTOMETRIC METHOD. (ISO 3946:1982).
UNE 37258:1986 LEAD. DETERMINATION OF ARSENIC CONTENT. SPECTROPHOTOCOLORIMETRY METHOD.
UNE 35026-1:1985 FERROALLIAGES. DETERMINATION OF PHOSPHORUS CONTENT. SPECTROPHOTOMETRIC METHOD

RO-ASRO

STAS SR 13257-1996 COFFEE Determination of nitrogen content by the Kjeldahi method Spectrophotometric method
STAS SR 9763-13-1996 Spices and condiments. Determination of nitrogen content by the Kjeldahl method. Spectrophotometric method
STAS SR EN 10179-1994 Chemicat analysis of ferrous materials - Determination of nitrogen (trace amounts) in steel - Spectrophotometric method
SR ISO 6685:1996 Chemical products for industrial use-General method for determination of iron content - 1,10 - Phenanthroline spectrophotometric method
STAS SR 13145-1993 Cast irons and steels. Determination of tantalum content. Spectrophotometrical method
STAS SR 13362-1996 Sodium chloride. Determination of iron. 1,10 - phenanthroline Photometric Method
STAS SR 11039-5-1996 Silicocalcium. Determination of phosphorus content. Spectrophotometric method

Lithuanian Standards Office

LST EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
LST EN ISO 5378:2000 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
LST EN ISO 3946:2000 Starches and derived products - Determination of total phosphorus content - Spectrophotometric method (ISO 3946:1982)

YU-JUS

JUS H.B8.287-1983 Fertilizers. Determination of content amid-nitrogen. Spectrophotometric method
JUS H.B8.637-1981 Sulphuric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method
JUS H.B8.043-1991 Liquid hydrocarbons. Determination of total chloride content. Spectrophotonetric method
JUS H.G8.418-1991 Reagents. Sodium hvdroxide. Determination of arsenic content. Silver diethvldithiocarbamate spectrophotometric method
JUS H.B8.815-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Determination of copper content - Atomic absorption spectrophotometric method
JUS B.G8.518-1990 AluminiuB ores. Detemiuat ioa of total silicon content. Combived gravlmetric and spectrophotometric metbod
JUS H.G8.130-1984 Reagents. Ammonia solution. Determination of iron content. 1,10—Phenanthrolinespectrophotometric method
JUS H.Z1.137-1985 Testing of industrial vvaters. Determination of nitrite-nitrate and the combined nitrite-nitrate nitrogen, Spectrophotometric method
JUS H.F8.232-1986 Gases. Determination of hydrocarbons content. Infrared spectrophotometric method
JUS B.G8.111-1989 Iron ores. Determination of manganese content. Spectrophotometric nethod
JUS E.Z8.014-1993 Soups,broaths,sauces and seasonings - Spectrophotometric determination of total creatinine content

KR-KS

KS H ISO 5378-2008(2023) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 3946-2008(2023) Starches and derived products－Determination of total phosphorus content－Spectrophotometric method
KS D ISO 4945-2022 Steel — Determination of nitrogen — Spectrophotometric method
KS E ISO 6607-2021 Aluminium ores — Determination of total silicon content —Combined gravimetric and spectrophotometric method
KS D ISO 17058-2020 Steel and iron — Determination of arsenic content —Spectrophotometric method

RU-GOST R

GOST 31980-2012 Milk. Spectrometric method for determination of total phosphorus content
GOST 31584-2012 Milk. Spectrophotometric method for determination of total phosphorus content
GOST 28902-1991 Animal feeding stuffs. Determination of total phosphorus content. Spectrophotometric method
GOST R 51482-1999 Meat and meat products. Spectrophotometric method for determination of total phosphorus content
GOST 32009-2013 Meat and meat products. Spectrophotometric method for determination of total phosphorous content
GOST 30181.5-1994 Mineral fertilizers. Method for determination of mass fraction of amide nitrogen in compound fertilizers (spectrophotocolorimetric method)

TR-TSE

TS 2466-1976 Nitric Acit For Industrial Use Determination of Ammoniacal Nitrogen Content Spectrophotoraetric Method
TS 3651-1981 METHODS FOR THE ANALYSIS OF WATER — DETERMINATION OF IRON CONTENT — 1,10 Phenanthroline Spectrophotometry Method
TS 2918-1978 PHOSPHORIC ACID FOR INDUSTRIAL USE (INCLUDING FOODSTUFFS) — DETERMINATION OF OXIDES OF NITROGEN CONTENT — 3,4 — XYLENOL SPECTROPHOTOMETRY

NL-NEN

NEN 2848-1986 Fruit juices - Determination of the total pectin content - Spectrophotometric method
NEN 6646-1990 Water - Photometric determination of the content of ammonium nitrogen and of the sum of the contents of ammoniacal and organically bound nitrogen according to Kjeldahl by continuous flow analysis
NEN 6489-1982 Water - Photometric determination of total cyanide content
NEN 6483-1982 Water - Potentiometric determination of the total fluoride content

CZ-CSN

CSN 65 1025 Cast.10-1989 Sulphuric acid for industrial use. pectrophotometric method for the etermination of total nitrogen xides
CSN EN 10 179-1993 Chemical analysis of ferrous metals — Determination of nitrogen (trace amounts) in steels — Spectrophotometric method
CSN ISO 9061:1992 Acid-grade and ceramic-grade fluorspar - Determination of iron content - 1,10-Phenantroline spectrometric method
CSN ISO 9438:1992 Metallurgical-grade fluorspar - Determination of total phosphorus content - Reduced molybdophosphate spectrometric method
CSN ISO 4942:1993 Steel and iron. Determination of the vanadium content. N-BPHA spectrophotometric method
CSN ISO 4751:1992 Copper and copper alloys - Determination of tin content - Spectrometric method

BSI

BS EN 10179:2024 Steels. Determination of nitrogen (trace amounts). Spectrophotometric method

BE-NBN

NBN T 03-041-1979 Nitric acid for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method
NBN-EN ISO 5378:1994 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
NBN T 03-024-1979 Sulphuric acid and oleum for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method
NBN P 32-004-1977 Zinc - Determination of copper content -Spectrophotometric method
NBN-EN ISO 3946:1994 Starches and derived products - Determination of total phosphorus content - Spectrophotometric method (ISO 3946:1982)
NBN T 04-304-1983 Urea for indus trial use - Determination of iron content-2,2'-Bipyridyl photometric method

ES-UNE

UNE-EN ISO 4945:2019 Steel - Determination of nitrogen - Spectrophotometric method (ISO 4945:2018)

PT-IPQ

NP 1841-1985 fish. Determination of trimethylamine nitrogen content (N-TMA). photometry

VN-TCVN

TCVN 2825-1999 Aluminium ores.Determination of total silicon content.Combined gravimetric and spectrophotometry method
TCVN 7724-2007 Water quality.Determination of merdury.Method using atomic fluorescence spectrometry

IT-UNI

UNI 7336-1974 Chemical analysis of ferrous materials. Determination of nitrogen in steel. Spectrophotometric method.

American National Standards Institute （ANSI)

BS ISO 19043:2023 Natural rubber latex concentrate. Determination of total phosphate content by spectrophotometric method (British Standard)