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trace nitrogen content

trace nitrogen content, Total:495 items.

In the international standard classification, trace nitrogen content involves: Products of the chemical industry, Coals, Organic chemicals, Fertilizers, Milk and milk products, Photography, Air quality, Analytical chemistry, Wastes, Ferroalloys, Non-ferrous metals, Soil quality. Pedology, Fuels, Conducting materials, Leather technology, Animal feeding stuffs, Meat, meat products and other animal produce, Spices and condiments. Food additives, Farming and forestry, Fruits. Vegetables, Cereals, pulses and derived products, Water quality, Food products in general, Raw materials for rubber and plastics, Protection against fire, Natural gas, Ferrous metals, Edible oils and fats. Oilseeds, Compressors and pneumatic machines, Rubber, Waxes, bituminous materials and other petroleum products, Beverages, Testing of metals, Physics. Chemistry, Ceramics, Sugar. Sugar products. Starch, External water conveyance systems, Petroleum products in general, Aircraft and space vehicles in general, Switchgear and controlgear, Products of the textile industry, Valves, General methods of tests and analysis for food products, Tobacco, tobacco products and related equipment, Inorganic chemicals.

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, trace nitrogen content

GB/T 14605-1993 Determination of trace argon, nitrogen and krypton inoxygen. Gas chromatographic method
GB/T 6625-1986 Test methods for nitrogen content of nitrogen-doped getter
GB/T 41965-2022 Photography—Processing waste—Determination of total amino nitrogen(microdiffusion Kjeldahl method)
GB/T 24583.2-2009 Vanadium-Nitrogen alloy.Determination of nitrogen content.Thermal conductimetric method after fusion in a current of inert gas
GB/T 41964-2022 Photography—Processing waste—Determination of ammoniacal nitrogen (microdiffusion method)
GB/T 3597-2002 Fertilizer--Determination of nitrate nitrogen content--Nitron gravimetric method
GB/T 9695.11-1988 Meat and meat products--Method for determination of nitrogen content
GB/T 9695.11-2008 Meat and meat products.Determination of nitrogen content
GB/T 41942-2022 Rubber, raw natural, and rubber latex, natural—Determination of nitrogen content—Micro Dumas combustion method
GB/T 8024-1987 Petroleum waxes and petrolatums--Determination of trace nitrogen--Microcoulometric method
GB/T 24583.3-2009 Vanadium-Nitrogen alloy.Determination of nitrogen content.The distillation-neutralization titration method
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 22427.10-2008 Starches and derived products-Determination of nitrogen content
GB/T 22427.10-2008 Starches and derived products-Determination of nitrogen content
GB/T 9823-1988 Method for determination of total nitrogen content in oilseed residues
GB/T 5511-2008 Cereals and pulses.Determination of the nitrogen content and calculation of the crude protein content.Kjeldahl method
GB/T 2441.1-2001 Determination of urea-Determination of total nitrogen content
GB/T 20124-2006 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (Routine method)
GB/T 13906-1992 Air quality.Determination of nitrogen oxides
GB/T 3600-2000 Fertilizers-Determination of ammoniacal nitrogen content-Formaldehyde method
GB/T 12091-1989 Method for determination of nitrogen content in starches and derived products
GB/T 8088-1999 Rubber,raw natural and rubber latex,natural--Determination of nitrogen content
GB/T 13598-1992 A method for the determination of agricultural chemical residues containing nitrogenous in tobacco leaves
GB/T 2441.1-2008 Determination of urea.Part 1:Total nitrogen content

ZA-SANS, trace nitrogen content

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 970:2010 Leather - Determination of nitrogen content and "hide substance" - Titrimetric method
SANS 8968-1:2006 Milk - Determination of nitrogen content Part 1: Kjeldahl method

RU-GOST R, trace nitrogen content

GOST 13301-1967 Organic chemical products. Method of test for microdetermination of nitrogen
GOST 8775.4-1987 Lithium. Method of determination of nitrogen
GOST 26107-1984 Soils. Methods for determination of total nitrogen
GOST 15933.11-1970 Ferroniobium. Method for the determination of nitrogen content
GOST 21600.6-1983 Ferrochrome. Method for the determination of nitrogen
GOST 34111-2017 Juice products. Determination of nitrogen content by Kjeldahl method
GOST 20851.2-1975 Mineral fertilizers. Methods for determination of phosphates
GOST EN 15478-2013 Fertilizers. Determination of total nitrogen in urea
GOST 20851.1-1975 Mineral fertilizers. Methods for determination of nitrogen content
GOST 30181.3-1994 Mineral fertilizers. Method for determination of mass fraction of nitrogen in fertilizers with nitrate 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 R 55331-2012 Milk and milk products. Titrimetric method of calcium content determination
GOST 32008-2012 Meat and meat products. Determination of nitrogen content (Reference method)
GOST 32459-2013 White phosphorus. Determination in water by gas chromatography with nitrogen-phosphorus detector
GOST R 55246-2012 Milk and milk products. Determination of non-protein nitrogen content by Kjeldahl method
GOST 12359-1999 Carbon, alloyed and high-alloyed steels. Methods for determination of nitrogen
GOST 22720.4-1977 Rare metals and their alloys. Method for the determination of nitrogen
GOST 12359-1981 Steels carbon, alloyed and highalloyed. Methods for the determination of nitrogen
GOST 30181.6-1994 Mineral fertilizers. Method for determination of mass fraction of nitrogen in ammonium salts (in ammonium form, using the formaldehyde method)
GOST R 53219-2008 Soil quality. Determination of nitrogen in air-dry soils using calcium chloride solution
GOST EN 15561-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
GOST R 51438-1999 Fruit and vegetable juices. Kjeldahl method for determination of nitrogen content

German Institute for Standardization, trace nitrogen content

DIN 51722-1:1990-07 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
DIN CEN/TS 15558:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch; German version CEN/TS 15558:2007
DIN CEN/TS 15559:2007 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd; German version CEN/TS 15559:2007
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 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 ISO 8968-3:2007-09 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method) (ISO 8968-3:2004); German version EN ISO 8968-3:2007
DIN EN ISO 8968-3:2007 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method) (ISO 8968-3:2004); English version of DIN EN ISO 8968-3:2007-09
DIN 51722-1:1990 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
DIN EN ISO 20483:2014-03 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013); German version EN ISO 20483:2013
DIN ISO 14255:1998 Soil quality - Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant (ISO 14255:1998)
DIN EN ISO 5983-1:2005-10 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005); German version EN ISO 5983-1:2005
DIN EN ISO 5983-1 Berichtigung 1:2009-07 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005); German version EN ISO 5983-1:2005, Corrigendum to DIN EN ISO 5983-1:2005-10; German version EN ISO 5983-1:20...
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 EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda; English version of DIN EN 15476:2009-04
DIN EN 12135:1997-12 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method; German version EN 12135:1997
DIN EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977); German version EN ISO 4945:2009
DIN EN ISO 8968-4:2016-09 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method) (ISO 8968-4:2016); German version EN ISO 8968-4:2016
DIN 33962:1997 Measurement of gaseous emissions - Automatic measurement systems for single measurements of nitrogen monooxide and nitrogen dioxide
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 53308:1968 Testing of leather; determination of the contents of total nitrogen and of ammonium salts, calculation of hide substance
DIN ISO 13878:1998 Soil quality - Determination of total nitrogen content by dry combustion ("elemental analysis") (ISO 13878:1998)
DIN EN ISO 10720:2007 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (ISO 10720:1997); English version of DIN EN ISO 10720:2007-06
DIN EN ISO 10720:2007-06 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (ISO 10720:1997); German version EN ISO 10720:2007
DIN 51864:1986-09 Testing of gaseous fuels and other gases; determination of nitrogen monoxide content; Saltzman method
DIN EN 15962:2011-04 Fertilizers - Determination of the complexed micro-nutrient content and of the complexed fraction of micro-nutrients; German version EN 15962:2011
DIN EN ISO 20483:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2006); German version EN ISO 20483:2006
DIN EN ISO 20483:2014 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013); German version EN ISO 20483:2013
DIN CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German version CEN/TS 15561:2007
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

Professional Standard - Petrochemical Industry, trace nitrogen content

SH/T 0413-1992 Determination of Trace Basic Nitrogen Content in Liquid Paraffin
SH/T 1784-2015 Isoprene for industrial use.Determination of trace extraction agent.Gas chromatographic method

PT-IPQ, trace nitrogen content

NP 1996-2000 Cereals and pulses Determiantion of the nitrogen content and calculation of the raw protein content Kjeldhal method
NP 3646-1987
NP 1612-2002 Meat and meat products Determination of nitrogen content Reference method
NP EN 12135-2000 Fruit and vegetable juices Determination of nitrogen content Kjeldahl method
NP 1986-1991 Milks Determination of protein content. Kjeldahl technique

YU-JUS, trace nitrogen content

JUS H.F8.131-1986 Gases. Determination of nitrogen content. Indirect method
JUS H.F8.132-1986 Gases. Determination of nitrogen content. Gas chromatographic method
JUS H.B8.288-1983 Fertilizers. Determination of content total-nitrogen. Volumetric method
JUS H.B8.814-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Determination of the chloride content (as chlorine ion)
JUS H.B8.286-1983 Fertilizers. Determination of content nitrat-nitrogen. Volumetric method
JUS H.B8.285-1983 Fertilizers. Determination of content amoniac-nitrogen. Volumetric method
JUS H.B8.815-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Determination of copper content - Atomic absorption spectrophotometric method
JUS H.G8.457-1991 Reagents. Potassium sulpbate. Determination of total nltrogen content. Colorlmetrlc metho?
JUS H.G8.083-1983 Reagents. Sodium chloride. Determination of total nitrogen content. Colorimetric method
JUS H.G8.435-1990 Reaqents. Potassium iodide. Determination of total nitroaen content. Colorimetric method
JUS H.B8.818-1992 Straight ammonium nitrate fertilizers of high nitrogen content - Methods for the application of thermal cycles
JUS H.G8.055-1983 Reagents. Hydrogen peroxide. Determination of total nitrogen content. Colorimetric method
JUS H.G8.290-1987 Reagents. Copper(ll) oxide. Determination of total nitrogen content. Colorimetric method
JUS H.G8.415-1991 Reagents. So?ium hydroxide. Determination of total nitrogen content. Colorimetric method
JUS H.G8.104-1984 Reagents. Potassium chloride. Determination of total nitrogen content. Colorimetric method
JUS H.G8.343-1988 Reagents. Zine chloride. Determination of total nitrogen content. Colorinetcic metbod
JUS E.Z8.016-1993 Soups,broaths,sauces and seasonings - Determination of total nitrogen content

VN-TCVN, trace nitrogen content

TCVN 6014-2007 Hard coal.Determination of nitrogen.Semi-micro Kjeldahl method
TCVN 5265-1990 Bee products.Determination of total nitrogen content
TCVN 3706-1990 Aquatic products.Method for the determination of nitrogen ammonia content
TCVN 3707-1990 Aquatic products.Method for the determination of amine ammonia nitrogen content
TCVN 6643-2000 Soil quality.Determination of nitrate nitrogen, ammonium nitrogen and total soluble nitrogen in air-dry soils using calcium chloride solution as extractant
TCVN 305-2010 Steel and iron.Determination of nitrongen content.Methods of chemical analysis.
TCVN 3708-1990 Aquatic products.Method for the determination of nitrogen amino acid content
TCVN 7252-2003 Tobacco and tobacco products.Determination of total nitrogen content
TCVN 6091-2004 Rubber, raw natural and rubber latex, natural.Determination of nitrogen content
TCVN 7373-2004 Soils quality.Index values of total nitrogen content in the soils of Vietnam

British Standards Institution (BSI), trace nitrogen content

BS EN 15558:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Ulsch
BS EN ISO 8968-5:2002 Milk. Determination of nitrogen content. Determination of protein-nitrogen content
BS EN ISO 8968-3:2007 Milk. Determination of nitrogen content. Block-digestion method (Semi-micro rapid routine method)
BS EN ISO 8968-4:2002 Milk. Determination of nitrogen content. Determination of non-protein nitrogen content
BS ISO 6853:2002 Photography - Processing waste - Determination of ammoniacal nitrogen (microdiffusion method)
BS ISO 8968-3:2004 Milk - Determination of nitrogen content - Block-digestion method (Semi-micro rapid routine method)
BS EN ISO 8968-3:2004 Milk - Determination of nitrogen content - Block-digestion method (Semi-micro rapid routine method)
BS DD CEN/TS 15478:2006 Fertilizers - Determination of total nitrogen in urea
DD ENV 12260-1996 Water quality. Determination of nitrogen. Determination of bound nitrogen, after combustion and oxidation to nitrogen dioxide, using chemiluminescence detection
BS ISO 6851:2002 Photography - Processing waste - Determination of total amino nitrogen (microdiffusion Kjeldahl method)
BS EN ISO 2614:2023 Analysis of natural gas. Biomethane. Determination of terpenes' content by micro gas chromatography
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 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS ISO 19051:2015 Rubber, raw natural, and rubber latex, natural. Determination of nitrogen content by Micro Dumas combustion method
BS EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
BS EN ISO 10720:1997 Steel and iron. Determination of nitrogen content. Thermal conductimetric method after fusion in a current of inert gas
BS EN ISO 10720:2007 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas
BS EN ISO 8968-4:2016 Milk and milk products. Determination of nitrogen content. Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
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 ISO 27871:2011 Cheese and processed cheese. Determination of the nitrogenous fractions
BS ISO 17997-2:2005 Milk - Determination of casein-nitrogen content - Direct method
BS EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
BS EN ISO 20483:2006 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
BS EN 15962:2011 Fertilizers. Determination of the complexed micro-nutrient content and of the complexed fraction of micro-nutrients
BS ISO 17997-2:2004 Milk. Determination of casein-nitrogen content - Direct method
DD ISO/TS 17837:2008 Milk and milk products. Determination of nitrogen content and crude protein calculation. Kjeldahl method
BS EN ISO 5983-1:2005 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Kjeldahl method
BS EN ISO 20483:2013 Cereals and pulses. Determination of the nitrogen content and calculation of the crude protein content. Kjeldahl method
BS ISO 8573-7:2003 Compressed air - Test method for viable microbiological contaminant content
BS 5551-4.1.1:1981 Fertilizers - Chemical analysis - Determination of nitrogen - Nitron gravimetric method for determination of nitrate nitrogen
BS 5551 SubSec.4.1.3:1986 Fertilizers. Chemical analysis. Determination of nitrogen. Method for determination of total nitrogen content (titrimetric method after distillation)
BS DD CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
BS EN 15561:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates
BS 4267-2:1988 Ammonium nitrate - Method for determination of total nitrogen content

Japanese Industrial Standards Committee (JISC), trace nitrogen content

JIS K 0104:2000 Methods for determination of nitrogen oxides in flue gas
JIS K 0104:1984 Methods for determination of oxides of nitrogen in flue gases
JIS K 0104:2011 Methods for determination of nitrogen oxides in flue gas
JIS K 0227:1984 Analytical method for trace nitrogen oxides in diluent gas and zero gas
JIS B 7953:1997 Continuous analysers for oxides of nitrogen in ambient air
JIS H 1685:1976 Methods for determination of nitrogen in tantalum
JIS G 1228:1997 Iron and steel -- Methods for determination of nitrogen content
JIS K 0315:2022 Method for measuring reducing trace gases by semiconductor-type trace gas measuring equipment
JIS K 2609:1998 Crude petroleum and petroleum products -- Determination of nitrogen content
JIS G 1228 AMD 1:2006 Iron and steel -- Methods for determination of nitrogen content (Amendment 1)
JIS D 1030:1998 Automobiles -- Analytical procedure for measurement of carbon monoxide, carbon dioxide, total hydrocarbons and oxides of nitrogen in exhaust gas

Korean Agency for Technology and Standards (KATS), trace nitrogen content

KS M ISO 6851:2002 Photography-Processing waste-Determination of total amino nitrogen-Microdiffusion Kjeldahl method
KS M ISO 4176-2006(2011) Fertilizers－Determination of nitrate nitrogen content－Nitron gravimetric method
KS B 5360-1990 Continuous Analysers for Oxides of Nitrogen in Ambient Air
KS B 5360-2001 Continuous Analysers for Oxides of Nitrogen in Ambient Air
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 M ISO 5397:2002 Leather－Determination of nitrogen content and “hide substance”－Titrimetric method
KS D 2555-2005 Methods for determination of nitrogen in tantalum
KS D 2530-2007 Methods for determination of nitrogen in titanium and titanium alloys
KS E 3733-1989 Determination or Carbon Monoxide and Temperature in Combustion Gases of Holed Briquette
KS D 1811-2003 Methods for determination of nitrogen in iron and steel
KS D ISO 10720-2003(2018) Steel and iron－Determination of nitrogen content－Thermal conductimetric method after fusion in a current of inert gas
KS M ISO 4176:2012 Fertilizers－Determination of nitrate nitrogen content－Nitron gravimetric method
KS M 8531-2004 Sodium hydroxide for nitrogen compounds analysis
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 M 2112-2011(2016) Crude petroleum and petroleum products —Determination of nitrogen content
KS M 2112-2011(2021) Crude petroleum and petroleum products —Determination of nitrogen content
KS M 2112-1986 Crude petroleum and petroleum products —Determination of nitrogen content
KS I ISO 13878:2009 Soil quality－Determination of total nitrogen content by dry combustion(“elemental analysis”)
KS M ISO 8603:2007 Solid fertilizers－Determination of urea nitrogen content－Gravimetric method using xanthydrol
KS M ISO 8603:2012 Solid fertilizers-Determination of urea nitrogen content-Gravimetric method using xanthydrol
KS H ISO 3188-2008(2018) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Titrimetric method
KS I ISO 13878-2009(2019) Soil quality－Determination of total nitrogen content by dry combustion(“elemental analysis”)
KS D ISO 10720:2003 Steel and iron-Determination of nitrogen content-Thermal conductimetric method after fusion in a current of inert gas
KS D ISO 15351-2003(2018) Steel and iron－Determination of nitrogen content－Thermal conductimetric method after fusion in a current of inert gas(Routine method)
KS D ISO 10700-2008(2018) Steel and iron－Determination of manganese content－Flame atomic absorption spectrometric method
KS D ISO 10702:2002 Steel and iron－Determination of nitrogen content－Titrimetric method after distillation
KS M ISO 5315-2007(2012) Fertilizers－Determination of total nitrogen content－Titrimetric method after distillation
KS H ISO 5378-2008(2018) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS M 2112-2011 Crude petroleum and petroleum products-Determination of nitrogen content
KS M ISO 5313:2007 High nitrogen content, straight ammonium nitrate fertilizers-Determination of oil retention
KS M ISO 5315:2007 Fertilizers-Determination of total nitrogen content-Titrimetric method after distillation
KS M ISO 1656:2010 Rubber, raw natural, and rubber latex, natural-Determination of nitrogen content

International Organization for Standardization (ISO), trace 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 Determination of milk nitrogen content Part 5: Determination of protein nitrogen content
ISO 8968-4:2001 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content
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 | IDF 20-5:2001 Milk — Determination of nitrogen content — Part 5: Determination of protein-nitrogen content
ISO 8968-4:2001|IDF 20-4:2001 Determination of milk nitrogen content Part 4: Determination of non-protein nitrogen content
ISO/TS 11725:2002 Solid mineral fuels - Determination of nitrogen - Semi-micro gasification method
ISO 8968-3:2004 | IDF 20-3:2004 Milk — Determination of nitrogen content — Part 3: Block-digestion method (Semi-micro rapid routine method)
ISO 333:1983 Coal; Determination of nitrogen; Semi-micro Kjeldahl method
ISO 5397:1984 Leather; Determination of nitrogen content and "hide substance"; Titrimetric method
ISO 6853:1987 Photography; Processing waste; Determination of ammoniacal nitrogen content; Microdiffusion method
ISO 333:1996 Coal - Determination of nitrogen - Semi-micro Kjeldahl method
ISO/DIS 2614 Analysis of natural gas — Biomethane — Determination of terpenes' content by micro gas chromatography
ISO 8968-4:2001/Cor 1:2011 Milk - Determination of nitrogen content - Part 4: Determination of non-protein-nitrogen content; Technical Corrigendum 1
ISO 3099:1974 Oilseed residues — Determination of total nitrogen content
ISO 5983:1979 Animal feeding stuffs; Determination of nitrogen content and calculation of crude protein content
ISO 19051:2015 Rubber, raw natural, and rubber latex, natural - Determination of nitrogen content by Micro Dumas combustion method
ISO 8968-3:2004|IDF 20-3:2004 Determination of milk nitrogen content Part 3: Block dissolution method (semi-microscopic rapid conventional method)
ISO 8968-1:2001 | IDF 20-1: 2001 Milk — Determination of nitrogen content — Part 1: Kjeldahl method
ISO 8968-3:2004/Cor 1:2011 | IDF 20-3:2004/Cor 1:2011 Milk — Determination of nitrogen content — Part 3: Block-digestion method (Semi-micro rapid routine method) — Technical Corrigendum 1
ISO 4176:1981 Fertilizers; Determination of nitrate nitrogen content; Nitron gravimetric method
ISO/DIS 7383 Fine bubble technology — Evaluation method for determining oxygen content in fine bubble dispersions in water
ISO 8968-4:2016 | IDF 20-4:2016 Milk and milk products — Determination of nitrogen content — Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
ISO 8968-3:2004 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method)
ISO 4945:1977 Steel; Determination of nitrogen content; Spectrophotometric method
ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
ISO 5983-2:2009 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 2: Block digestion and steam distillation method
ISO 15351:1999 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (Routine method)
ISO 8603:1993 Solid fertilizers; determination of urea nitrogen content; gravimetric method using xanthydrol
ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
ISO 8968-1:2001 Lait - Détermination de la teneur en azote - Partie 1: Méthode Kjeldahl (Deuxième édition)
ISO 937:1978 Meat and meat products; Determination of nitrogen content (Reference method)
ISO 8968-1:2001|IDF 20-1:2001 Determination of milk nitrogen content Part 1: Kjeldahl method
ISO/FDIS 2614:2023 Analysis of natural gas — Biomethane — Determination of terpenes' content by micro gas chromatography
ISO 2614:2023 Analysis of natural gas — Biomethane — Determination of terpenes' content by micro gas chromatography
ISO 333:1996/Cor 1:1996 Coal - Determination of nitrogen - Semi-micro Kjeldahl method; Technical Corrigendum 1
ISO 20483:2013 Cereals and pulses.Determination of the nitrogen content and calculation of the crude protein content.Kjeldahl method
ISO 1871:2009 Food and feed products - General guidelines for the determination of nitrogen by the Kjeldahl method
ISO/TS 17837:2008 | IDF/RM 25: 2008 Processed cheese products — Determination of nitrogen content and crude protein calculation — Kjeldahl method
ISO 10702:1993 Steel and iron; determination of nitrogen content; titrimetric method after distillation
ISO 5315:1984 Fertilizers; Determination of total nitrogen content; Titrimetric method after distillation

国家市场监督管理总局、中国国家标准化管理委员会, trace nitrogen content

GB/T 24583.2-2019 Vanadium-nitrogen—Determination of nitrogen content—Thermal conductimetric method after fusion in a current of inert gas
GB/T 38395-2019 Coal tar—Determination of sulfur and nitrogen content
GB/T 13277.7-2021 Compressed air—Part 7：Test method for viable microbiological contaminant content
GB/T 24583.3-2019 Vanadium-nitrogen—Determination of nitrogen content—Distillation-neutralization titration method
GB/T 40535.1-2021 Test methods of continuous nitride ceramic fibers—Part 1：Nitrogen content

工业和信息化部, trace nitrogen content

YB/T 4566.1-2016 Determination of nitrogen content in vanadium iron nitride by inert gas melting thermal conductivity method
YB/T 4529-2016 Determination of nitrogen content in manganese iron nitride by inert gas melting thermal conductivity method
YB/T 4528-2016 Determination of nitrogen content in ferrochromium nitride and high nitrogen ferrochrome by inert gas melting thermal conductivity method
YB/T 4565-2016 Determination of titanium iron nitrogen content by inert gas melting thermal conductivity method
YB/T 4582.7-2017 Determination of total nitrogen content of ferrous silicon nitride by neutralization titration method
YB/T 4566.5-2016 Determination of vanadium ferrosilicon content by sulfuric acid dehydration gravimetric method
YB/T 4779-2019 Determination of nitrogen content in vanadium-nitrogen alloys by pulse heating inert gas melting-time-of-flight mass spectrometry (conventional method)
YB/T 4582.8-2017 Determination of silicon content in ferrosilicon nitride perchloric acid dehydration gravimetric method
YB/T 4582.1-2017 Determination of calcium iron silicon nitride content EDTA titration method
YB/T 4582.5-2017 Determination of ferrosilicon aluminum nitride content EDTA titration method
YB/T 4566.2-2016 Determination of nitrogen content of vanadium iron nitride, distillation and separation-acid-base neutralization titration method

RO-ASRO, trace nitrogen content

STAS 6843-1982 STEELS ANI) CAST 1RONS Determination of nitrogen content
SR ISO 4176:1981 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method
SR 184-25-1998 Ethyl alcohol. Determination of ammonia and azotic bases nitrogen content
STAS 6182/4-1979 WINE Determination of total nitrogen content
STAS 7184/2-1985 SOILS Nitrogen content determination
STAS SR 13325-1995 Animal feeding stuffs - Determination of total nitrogen content and calculation of crude protein content
STAS 7425-1979 NITROCELLULOSES Determination of nitrogen content
STAS SR 12271-6-1994
STAS 8613/6-1980 CONCENTRATED FOODSTUFF Determination of nitrogen content
STAS 8854-1972 ADDITIVES FOR MINERAL OILS Determination of nitrogen content
STAS 7312-1983 SURFACE AND RESIDUAL WATERS Determination of azote content
STAS SR 4895-5-1997 Tobacco and tobacco products. Determination of total nitrogen content
SR ISO 5315:1984 Fertilizers. Determination of totai nitrogen content.Titrimetric method after distilation

Association Francaise de Normalisation, trace nitrogen content

NF U42-141:1984 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method.
NF V04-221-5:2002 Milk - Determination of nitrogen content - Part 5 : determination of protein-nitrogen content.
NF V04-221-4:2002 Milk - Determination of nitrogen content - Part 4 : determination of non-protein nitrogen content.
NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
NF EN ISO 8968-3:2007 Lait - Détermination de la teneur en azote - Partie 3 : méthode de minéralisation en bloc (Méthode de routine semi-micro rapide)
NF X43-009:1973 Nitrogen dioxyde content of the atmosphere (griess saltzman reaction).
NF V59-202:1988 Collagenes. Determination of the nitrogen content.
NF U42-117:1965 Products used in agriculture. Fertilizers. Determination of nitrogen content in class a nitrogenous fertilizers.
NF U42-118:1965 Products used in agriculture. Determination of nitrogen content in class B nitrogenous fertilizers.
NF U42-119:1965 Products used in agriculture. Determination of nitrogen content in class C nitrogenous fertilizers.
NF EN ISO 20483:2014 Céréales et légumineuses - Détermination de la teneur en azote et calcul de la teneur en protéines brutes - Méthode de Kjeldahl
NF X31-111*NF ISO 11261:1995 Soil quality. Determination of total nitrogen. Modified kjeldahl method.
NF X43-018:1983 Air pollution. Measurement of nitrogen oxides by chemiluminescence.
NF U42-191:1988 Fertilizers. Nitrogenous fertilizers containing synthetic organic nitrogen. Determination of the types of nitrogen.
NF V03-750:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method.
NF EN ISO 5983-1:2005 Aliments des animaux - Détermination de la teneur en azote et calcul de la teneur en protéines brutes - Partie 1 : méthode Kjeldahl
NF C17-200 F1:2000 Solid mineral fuels - Determination of nitrogen.
NF X33-009*NF EN 13342:2000 Characterization of sludges - Determination of Kjeldahl nitrogen
NF T90-015:1975 TESTING WATER-DETERMINATION OF NITROGEN (AMMONIA)
NF EN ISO 8968-1:2014 Lait et produits laitiers - Détermination de la teneur en azote - Partie 1 : méthode Kjeldahl et calcul de la teneur en protéines brutes
NF V04-221-3*NF EN ISO 8968-3:2007 Milk - Determination of nitrogen content - Part 3 : block-digestion method (semi-micro rapid routine method).
NF U42-416*NF EN 15478:2009 Fertilizers - Determination of total nitrogen in urea.
NF X31-418*NF ISO 13878:1998 Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").
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 EN ISO 8968-4:2016 Lait et produits laitiers - Détermination de la teneur en azote - Partie 4 : détermination de la teneur en azote protéique et non protéique et calcul de la teneur en protéines vraies (Méthode de référence)
NF X43-256:1988 AIR QUALITY. WORKPLACE AIR. SAMPLING AND DETERMINATION OF LEAD AIRBONE PARTICULATE MATTER.
NF EN 15750:2010 Engrais - Détermination de la teneur en azote total des engrais ne contenant l'azote que sous forme nitrique, ammoniacale et uréique, selon deux méthodes différentes
NF ISO 27871:2011 Fromages et fromages fondus - Détermination des fractions azotées
NF A06-559*NF EN ISO 15351:2010 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (Routine method)
NF EN 15962:2011 Engrais - Dosage de la teneur en oligo-élément complexé et de la fraction complexée des oligo-éléments
NF V04-221-4*NF EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4 : determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
NF U42-150*NF EN 15962:2011 Fertilizers - Determination of the complexed micro-nutrient content and of the complexed fraction of micro-nutrients
NF ISO 13878:1998 Qualité du sol - Détermination de la teneur totale en azote par combustion sèche ("analyse élémentaire")
NF V04-279*NF ISO 27871:2011 Cheese and processed cheese - Determination of nitrogenous fractions
NF U42-151:1984 Fertilizers. Determination of total nitrogen content. Titrimetric method after distillation.
NF V03-750*NF EN ISO 20483:2014 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
NF A06-380*NF EN ISO 10720:2007 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas
NF EN ISO 16960:2014 Gaz naturel - Détermination des composés soufrés - Détermination de la teneur totale en soufre par microcoulométrie oxydante
NF T43-106:2008 Rubber, raw natural, and rubber latex, natural - Determination of nitrogen content.
NF T43-106:2015 Rubber, raw natural, and rubber latex, natural - Determination of nitrogen content
NF X34-117*NF EN ISO 16948:2015 Solid biofuels - Determination of total content of carbon, hydrogen and nitrogen
NF A06-654:1993 Chemical analysis of titanium alloys. Determination of nitrogen content. Titrimetric method.
NF A06-324*NF ISO 10702:1996 Steel and iron. Determination of nitrogen content. Titrimetric method after distillation.

NL-NEN, trace nitrogen content

NEN 2044-1985 Air quahty - txhaust gases Wet chemical determination of nitrogen oxides content
NEN 6642-1992 Water-Calculation of total nitrogen content
NEN 3760-1984 Cheese - Determination of the nitrogen content according to Kjeldahl - Calculation of the crude protein content
NEN 3442-1968 Meat and meat products. Determination of nitrogen content
NEN 2038-1979 Air quality - Calibration gas mixture of nitrogen monoxide in nitrogen - Gravimetric preparation
NEN 2041-1982 Air quality — Ambient air — Photometric determination of the nitrogen monoxide content (oxidation/Saltzman 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 2045-1981 Air quality - The calibration of measuring methods for nitrogen monoxide, nitrogen dioxide and ozone by means of gas-phase titration
NEN 2040-1979 Ambient air - Photometric determination of nitrogen dioxide content (Saltzman method)

NO-SN, trace nitrogen content

NS 4869-1985 Air quality - Nitrogen dioxide content in workplace atmosphere - Colometric metod

Indonesia Standards, trace nitrogen content

SNI 19-1432-1989 Exhaust-gases, Test methods for nitrogen dioxide content
SNI 19-1502-1989 Test method for nitrogen oxides content of air in working area
SNI 13-3482-1994 Coal, Determination of nitrogen using Kyeldahl method
SNI 13-4721-1998 Methods for determination of total nitrogen content in soils
SNI 06-6323-2000 Determination of total nitrogen content in peat
SNI 4146-2013
SNI 7617-2013
SNI 19-7119.2-2005 Ambient atmospheres - Part 2: Test methods of nitrogen dioxide (NO2) content by Griess Saltzman using spectrophotometers
SNI 19-1501-1989 Test methods for total nitrogen oxide in air

PL-PKN, trace nitrogen content

PN Z04075-1961 Speedy Me?hod for De?er mina?ion of Ni?rogen Oxyde* in Air
PN C87077-1992 Nitrogenous fertilizers. Determination of cooper
PN C04576 ArkusZ14-1973 Water and w?sie water Tes?s for nitrogen Calcula?ion of to?al nitrogen
PN A86026-1990 Milk and dairy products Milk powdcr Determination of nitritc and nitrate contents
PN Z04009-04-1993 Air purity protection. Tests for content of nitrogen and its compounds. Determination of nitrates in dust in ambient air (imission) by spectrophotometric method with sodium salicilate
PN P22117-1992 Leathers. Determination of nitrogen content ammonium salts and "hide substance"

HU-MSZT, trace nitrogen content

International Dairy Federation (IDF), trace nitrogen content

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
IDF 20-1-2001 Milk - Determination of nitrogen content - Part 1: Kjeldahl method

Danish Standards Foundation, trace nitrogen content

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 ISO 8968-3:2007 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method)
DS/EN ISO 20483:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
DS/EN ISO 5983-1/AC:2009 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method
DS/EN ISO 5983-1:2005 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method
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
DS/EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
DS/EN 10179:1989 Chemical analysis of ferrous materials. Determination of nitrogen (trace amount) in steels. Spectrophotometric method
DS/EN 15962:2011 Fertilizers - Determination of the complexed micro-nutrient content and of the complexed fraction of micro-nutrients
DS/EN ISO 10720:2007 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas
DS/EN ISO 3188:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method

Professional Standard - Agriculture, trace nitrogen content

GB 3597-1983 Determination of nitrate nitrogen content in fertilizers Nitrogen reagent gravimetric method
NY/T 1116-2014 Fertilizers.Determination of nitrate nitrogen, ammonium nitrogen, amide nitrogen contents
NY/T 2542-2014 Fertilizers.Determination of total nitrogen content
NY/T 2419-2013 Determination of total nitrogen in plant.Automatic kjeldahl apparatus method
219药典三部-2020 Content Determination Method 0704 Nitrogen Determination Method
GB 8088-1987 Determination of Nitrogen Content in Natural Raw Rubber
GB 8572-1988 Determination of total nitrogen content in compound fertilizer
NY/T 53-1987 Method for the determination of soil total nitrogen(Semi-micro Kjeldahl method)
GB 7173-1987 Determination of total nitrogen in soil (semi-micro Kelvin method)
NY/T 1977-2010 Water-suluble fertilizers-Determination of total nitrogen, phosphorus and potassium content
200药典三部-2015 Content Determination Method 0704 General Principles of Nitrogen Determination Method 49

American Society for Testing and Materials (ASTM), trace nitrogen content

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
ASTM E147-61(2006) Standard Specification for Apparatus For Microdetermination Of Nitrogen By Kjeldahl Method
ASTM E147-61(2011) Standard Specification for Apparatus for Microdetermination of Nitrogen by Kjeldahl Method
ASTM E147-61(2017) Standard Specification for Apparatus for Microdetermination of Nitrogen by Kjeldahl Method
ASTM D2868-17 Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White
ASTM D2868-96 Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
ASTM D2868-96(2001) Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
ASTM D2868-10 Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
ASTM D3533-90(1995)e1 Standard Method of Rubber8212;Nitrogen Content
ASTM D3533-90(2001) Standard Test Method for Rubber8212;Nitrogen Content
ASTM D1607-91(2000)e1 Standard Test Method for Nitrogen Dioxide Content of the Atmosphere (Griess-Saltzman Reaction)
ASTM D1607-91(2018)e1 Standard Test Method for Nitrogen Dioxide Content of the Atmosphere (Griess-Saltzman Reaction)
ASTM D3533-05 Standard Test Method for Rubber—Nitrogen Content
ASTM D2868-07 Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather
ASTM D1607-91(2005) Standard Test Method for Nitrogen Dioxide Content of the Atmosphere (Griess-Saltzman Reaction)

Heilongjiang Provincial Standard of the People's Republic of China, trace nitrogen content

DB23/T 2963-2021 Determination of Trace Calcium Content in Natural Flake Graphite by Calcium-Arsenazo Ⅲ Spectrophotometric Method

SE-SIS, trace nitrogen content

SIS SS 02 84 15-1980 Workplace atmosphere — Nitrogen dioxide content in air — Colorimetric method
SIS SS 02 81 33-1991 Determination of the sum of the nitrite and nitrate nitrogen content of water

Anhui Provincial Standard of the People's Republic of China, trace nitrogen content

DB34/T 3690-2020 Determination of carbon dioxide and nitrogen content in liquefied petroleum gas

Group Standards of the People's Republic of China, trace nitrogen content

T/NAIA 009-2020 Determination of soil microbial biomass nitrogen
T/NXCL 023-2023 Determination of hydrogen and nitrogen in Beryllium— Inert gas fusion infrared absorption/ thermal conductivity method
T/CNIA 0016-2019 Determination of Hydrogen Chloride, Nitrogen, Oxygen and Total Carbon Content in Recycled Hydrogen for Polysilicon by Gas Chromatography
T/ZZB 0817-2018 Brass micro exhaust valve

BG-BDS, trace nitrogen content

BGC ISO 5983:2001 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Kjeldahl method

European Committee for Standardization (CEN), trace nitrogen content

EN ISO 8968-3:2007 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method)
EN ISO 8968-5:2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
EN ISO 8968-3:2007/AC:2012 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method) - Technical Corrigendum 1 (ISO 8968-3:2004/Cor 1:2011)
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 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
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
EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)
EN ISO 10720:2007 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas
prEN ISO 2614 Analysis of natural gas - Biomethane - Determination of terpenes' content by micro gas chromatography (ISO/DIS 2614:2022)
EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
EN 15962:2011 Fertilizers - Determination of the complexed micro-nutrient content and of the complexed fraction of micro-nutrients
EN ISO 20483:2013 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method

CZ-CSN, trace nitrogen content

CSN 65 0331-1963 Deterimination oí Nierogea by Kjeldahl's method
CSN 65 4814-1976 Determinaíion of nitrogen oontent in fertilizers
CSN 65 4843-1983 Fertilizers with microelements. Testing of manganese content
CSN 65 4844-1983 Fertilizers with microelements. Testing oí molybden?m content
CSN 65 4841-1983 Fertilizers with microelements. Testing of cobalt content
CSN 65 4842-1983 Fertilizers with microelements. Testing of copper contfmt.
CSN 65 4845-1983 Fertilizers wlth microelements. Testlng of zinc content
CSN 65 4840-1983 Fertilizers with microelements. Testing of boron content
CSN 62 3008-1986 Natural raw rubber in blocks. Determination of nitrogen content
CSN 56 0020-1987 General directions for the determination f nitrogen by the Kjeldahl method
CSN 42 0566 Cast.7-1987 Chemical analysis of manganese. Determination of nitrogen content
CSN 70 4243-1981 Glass apparatus by Parnas-Wagner for the determination of nitrogen
CSN 65 4835-1983 Minerál fertilizers. Determination of ammoniacal nitrogen content by distillating method
CSN 65 4836-1983 Minerál fertilizers Methode for determination of total nitrogen content
CSN 42 0525-1980 Chemical analysis of technical iron. Determination of the nitrogen content
CSN 50 0393-1986 Determination of the content of or- ganic nitrogen in páper and paper- board
CSN ISO 1871:1994 Agricultural food products-General directions for the determination of nitrogen by the Kjeldahl method
CSN 83 4728 Cast.1-1984 Air quality. Emission measurement of ammonia from stationary sources of air pollution. General part

Lithuanian Standards Office , trace nitrogen content

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 ISO 20483:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2006)
LST EN 12135-2001 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
LST EN ISO 8968-3:2007 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method) (ISO 8968-3:2004)
LST EN ISO 5983-1:2005 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005)
LST EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method (ISO 8968-1:2001)
LST EN ISO 5983-1:2005/AC:2009 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005/Cor 1:2008)
LST EN 15962-2011 Fertilizers - Determination of the complexed micro-nutrient content and of the complexed fraction of micro-nutrients

TR-TSE, trace nitrogen content

TS 362-1966 DETERMINAT?ON OF NITROGEN ?N COAL BY THE SEMI ■ M?KRO KJELDAHL METHOD
TS 2428-1976 METHODS FOR THE CHEMICAL ANALYSIS OF IRON AND STEELS DETERMINATION OF NITROGEN CONTENT

American National Standards Institute （ANSI), trace nitrogen content

ANSI/PIMA IT4.48-1998 Photography (Processing) - Effluents - Determination of Ammoniacal Nitrogen Content - Microdiffusion Method
ANSI/PIMA IT4.47-1998 Photography (Processing) - Effluents - Determination of Total Amino Nitrogen - Microdiffusion Kjeldahl Method

Jilin Provincial Standard of the People's Republic of China, trace nitrogen content

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

VE-FONDONORMA, trace nitrogen content

NORVEN 378

Professional Standard - Military and Civilian Products, trace nitrogen content

WJ 2128-1993 Method for Determination of Nitrogen Content in Primer

Taiwan Provincial Standard of the People's Republic of China, trace nitrogen content

CNS 1289-1960 Method of Test for Leather (Nitrogen Content Test)
CNS 14476-2000 Method of test for sulfur in petroleum gas by oxidative microcoulometry

AENOR, trace nitrogen content

UNE 32013:1995 COAL. DETERMINATION OF NITROGEN. SEMI-MICRO KJELDAHL METHOD.
UNE-EN ISO 20483:2014 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013)
UNE-EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
UNE-EN ISO 8968-3:2007 Milk - Determination of nitrogen content - Part 3: Block-digestion method (Semi-micro rapid routine method) (ISO 8968-3:2004)
UNE-EN ISO 5983-1:2007 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005)
UNE 84047:1995 COSMETIC RAW MATERIALS. DETERMINATION OF NITROGEN. KJEDHAL'S METHOD (SEMI-MICRO).
UNE 53375-1:2007 Plastics. Determination of carbon black content of polyolefins and its products. Part 1: Nitrogen atmosphere test
UNE-EN 15962:2011 Fertilizers - Determination of the complexed micro-nutrient content and of the complexed fraction of micro-nutrients
UNE 77325:2003 Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").

Shandong Provincial Standard of the People's Republic of China, trace nitrogen content

DB37/T 2735-2015 Determination of ammonium sulfate content in dry powder fire extinguishing agent Total nitrogen content method

BE-NBN, trace nitrogen content

NBN T 94-301-1976 Determination of nitrogen dioxyde contents of ambient air -Griess-Saltzman method
NBN T 94-302-1976 Determination of nitrogen oxydes and of nitrogen monoxyde contents of ambient air - Griess-Saltzman method
NBN-EN 10179-1992 Chemical analysis of ferrous materials. Determination of nitrogen (trace amounts) in steels. Spectrophotometric method
NBN V 21-003-1987 Milk - Determination of nitrogen content - Kjeldahl method
NBN V 21-013-1978 Determination of the total nitrogen contaimng substances content of milk - Amido black method
NBN T 04-301-1983 Urea for industrial use - Determination of nitrogen content - Titrimetric raethod after distillation
NBN T 95-301-1977 Determination of the nitrogen oxides content of flue gasses -Photometrie method with chromotropic acid

Military Standard of the People's Republic of China-General Armament Department, trace nitrogen content

GJB 770.303-1989 Test methods for gunpowder analysis: Determination of nitrogen content of nitrocellulose. Five-tube nitrogen meter method
GJB 337-1987 Determination method of nitrogen content of nitrocellulose (interferometer method)

CO-ICONTEC, trace nitrogen content

ICONTEC 1556-1980

ES-UNE, trace nitrogen content

UNE-EN ISO 5983-1:2007/AC:2009 Animal feeding stuffs - Determination of nitrogen content and calculation of crude protein content - Part 1: Kjeldahl method (ISO 5983-1:2005/Cor 1:2008)
UNE-CEN/TS 17762:2022 Inorganic fertilizers - Determination of the copper content in ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)
UNE-CEN/TS 17761:2022 Inorganic fertilizers - Determination of the chloride content in ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)
UNE-EN ISO 8968-4:2016 Milk and milk products - Determination of nitrogen content - Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method) (ISO 8968-4:2016)

未注明发布机构, trace nitrogen content

BS EN ISO 5983-1:2005(2009) Animal feeding stuffs — Determination of nitrogen content and calculation of crude protein content — Part 1 : Kjeldahl method
BS EN ISO 8968-4:2016(2017) Milk and milk products — Determination of nitrogen content Part 4 : Determination of protein and non - protein nitrogen content and true protein content calculation (Reference method)
BS EN ISO 3188:1994(1999) Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method
BS EN ISO 5378:1994(1999) Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Spectrometric method
DIN EN ISO 8968-1:2002 Milk — Determination of nitrogen content — Part 1: Kjeldahl method (ISO 8968-1:2001)

AR-IRAM, trace nitrogen content

IRAM 14 522-1961

TN-INNORPI, trace nitrogen content

NT 14.33-1983

FI-SFS, trace nitrogen content

SFS 3029 E-1976 In the event of any differences in interpretation of this standard the Finnish version shall take precedence over this translation

National Sanitation Foundation (NSF), trace nitrogen content

NSF 245A-2010 Wastewater Treatment Systems - Nitrogen Reduction

TH-TISI, trace nitrogen content

TIS 2255.1-2005 Animal feeding stuff s-determination of nitrogen content and calculation of crude protein content.part 1: kjeldahl method

Professional Standard - Ferrous Metallurgy, trace nitrogen content

YB/T 4530-2016 Nitrogen-bearing ferromanganese.Determination of nitrogen content.The distillation-neutralization titration method
YB/T 4306-2012 Steel,iron and alloy.Determination of nitrogen content.Thermal conductimetric method after fusion in a current of inert gas

Hunan Provincial Standard of the People's Republic of China, trace nitrogen content

DB43/T 751-2013 Determination of Nitrogen in Graphite by Semi-Micro Kelvin Method

CEN - European Committee for Standardization, trace nitrogen content

EN ISO 8968-4:2001 Milk - Determination of Nitrogen Content - Part 4: Determination of Non-Protein Nitrogen Content
EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method

Professional Standard - Commodity Inspection, trace nitrogen content

SN/T 0840-2015 Determination of nitrogen content of urea for import and export
SN/T 0840-1999 Method for the determination of nitrogen content of urea for import and export
SN/T 0736.5-1999 Chemical analysis of fertilizers for import and export.Determination of nitrogen content

Professional Standard - Building Materials, trace nitrogen content

JC/T 2342-2015 Method for the quantitative phase analysis of silicon nitride

Standard Association of Australia （SAA）, trace nitrogen content

AS ISO 8968.4:2021 Milk and milk products — Determination of nitrogen content, Part 4: Determination of protein and non-protein nitrogen content and true protein content calculation (Reference method)

Professional Standard - Aerospace, trace nitrogen content

QJ 2781A-2004 Determination of the carbon content,the hydrogen content and the nitrogen contene of carbonaceous material
QJ 2781-1995 Method for Determination of Carbon, Hydrogen and Nitrogen Content in Carbon Materials

CU-NC, trace nitrogen content

NC 24-65-1986 Inorganic Chemical Products Nitrogen. Determination of Water Vapor Content. Aerial Water Point Method
NC 24-64-1986 Inorganic Chemical Products Nitrogen, Determination of Oil Content

KR-KS, trace nitrogen content

KS M ISO 8603-2007 Solid fertilizers－Determination of urea nitrogen content－Gravimetric method using xanthydrol

Professional Standard - Machinery, trace nitrogen content

JB/T 11531-2013 Transmitters for moisture content in sulfur hexafluoride gas for high voltage switches

Professional Standard - Light Industry, trace nitrogen content

QB/T 3812.17-1999 Leather.Determination of nitrogen content and “hide substance”.Titrimtric method

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, trace nitrogen content

GB/T 34532-2017 Coking wastewater—Determination of ammonia nitrogen content—Formaldehyde method

AT-ON, trace nitrogen content

ONORM DIN 10334-1994 Determination of nitrogen content of milk according to Kjeldahl and calculation of crude protein content