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nitrogen content

nitrogen content, Total:496 items.

In the international standard classification, nitrogen content involves: Fertilizers, Milk and milk products, Non-ferrous metals, Ferroalloys, Coals, Products of the chemical industry, Meat, meat products and other animal produce, Spices and condiments. Food additives, Analytical chemistry, Soil quality. Pedology, Fuels, Food products in general, Ferrous metals, Raw materials for rubber and plastics, Edible oils and fats. Oilseeds, Water quality, Organic chemicals, Farming and forestry, Rubber, Sugar. Sugar products. Starch, Fruits. Vegetables, Petroleum products in general, Air quality, Beverages, Leather technology, Protection against fire, Tea. Coffee. Cocoa, Conducting materials, Inorganic chemicals, Animal feeding stuffs, Rubber and plastics products, Crude petroleum, Testing of metals, External water conveyance systems, General methods of tests and analysis for food products, Wastes, Photography, Aircraft and space vehicles in general, Cereals, pulses and derived products, Plastics, Construction materials.

German Institute for Standardization, nitrogen content

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 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977); German version EN ISO 4945:2009
DIN EN 12135:1997-12 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method; German version EN 12135:1997
DIN CEN/TS 17771:2022-07 Organic and organo-mineral fertilizers - Determination of the nitrogen content; German version CEN/TS 17771:2022
DIN EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda; English version of DIN EN 15476:2009-04
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 EN 12135:1997 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method; German version EN 12135:1997
DIN 51722-1:1990-07 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
DIN CEN/TS 15561:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide containing nitrates; German version CEN/TS 15561:2007
DIN EN ISO 14891:2002 Milk and milk products - Determination of nitrogen content - Routine method using combustion according to the Dumas principle (ISO 14891:2002); German version EN ISO 14891:2002
DIN EN 13560:2002-03 Surface active agents - Determination of amide nitrogen content - Potentiometric titration; German version EN 13560:2001
DIN ISO 13878:1998 Soil quality - Determination of total nitrogen content by dry combustion ("elemental analysis") (ISO 13878:1998)
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 CEN/TS 15560:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free; German version CEN/TS 15560:2007
DIN EN 12260:2003 Water quality - Determination of nitrogen - Determination of bound nitrogen (TN<(Index)b>), following oxidation to nitrogen oxides; German version EN 12260:2003
DIN EN ISO 11905-1:1998 Water quality - Determination of nitrogen - Part 1: Method using oxidative digestion with peroxodisulfate (ISO 11905-1:1997); German version EN ISO 11905-1:1998
DIN 51722-1:1990 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
DIN CEN/TS 17759:2022-07 Inorganic fertilizers - Determination of pH of a solution of ammonium nitrate fertilizers of high nitrogen content; German version CEN/TS 17759:2022
DIN EN 13654-2:2002 Soil improvers and growing media - Determination of nitrogen - Part 2: Dumas method; German version EN 13654-2:2001

British Standards Institution (BSI), 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 8968-4:2002 Milk. Determination of nitrogen content. Determination of non-protein nitrogen content
BS DD CEN/TS 15478:2006 Fertilizers - Determination of total nitrogen in urea
BS EN ISO 4945:2010 Steel. Determination of nitrogen content. Spectrophotometric method
BS EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
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 17997-2:2005 Milk - Determination of casein-nitrogen content - Direct method
BS ISO 17997-2:2004 Milk. Determination of casein-nitrogen content - Direct method
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 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)
PD CEN/TS 17771:2022 Organic and organo-mineral fertilizers. Determination of the nitrogen content
BS EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
BS DD CEN/TS 15407:2006 Solid recovered fuels - Method for the determination of carbon (C), hydrogen (H) and nitrogen (N) content
BS 4267-1:1988 Ammonium nitrate - Method for determination of ammoniacal nitrogen content
BS ISO 17997-1:2005 Milk - Determination of casein-nitrogen content - Indirect method (Reference method)
BS ISO 937:2023 Meat and meat products. Determination of nitrogen content. Reference method
BS EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
BS ISO 17997-1:2004 Milk. Determination of casein-nitrogen content - Indirect method (Reference method)
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 ISO 6853:2002 Photography - Processing waste - Determination of ammoniacal nitrogen (microdiffusion method)
BS EN 13560:2001 Surface active agents - Determination of amide nitrogen content - Potentiometric titration
BS EN 13560:2002 Surface active agents - Determination of amide nitrogen content - Potentiometric titration
BS ISO 29541:2010 Solid mineral fuels. Determination of total carbon, hydrogen and nitrogen content. Instrumental method
BS EN 13560:2001(2003) Surface active agents - Determination of amide nitrogen content - Potentiometric titration
BS EN 15559:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Arnd
DD ISO/TS 17837:2008 Milk and milk products. Determination of nitrogen content and crude protein calculation. Kjeldahl method
BS DD CEN/TS 15560:2007 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
BS 7164-21:1996 Chemical tests for raw and vulcanized rubber - Determination of nitrogen content
BS EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free
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
22/30444436 DC BS ISO 937. Meat and meat products. Determination of nitrogen content. Reference method
BS 4401-2:1980 Methods of test for meat and meat products. Determination of nitrogen content (reference method)
BS EN ISO 8968-3:2007 Milk. Determination of nitrogen content. Block-digestion method (Semi-micro rapid routine method)
BS EN 15750:2010 Fertilizers. Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
BS EN 15750:2009 Fertilizers - Determination of total nitrogen in fertilizers containing nitrogen only as nitric, ammoniacal and urea nitrogen by two different methods
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 ISO 1656:2019 Tracked Changes. Rubber, raw natural, and rubber latex, natural. Determination of nitrogen content
BS ISO 1656:2014 Rubber, raw natural, and rubber latex, natural. Determination of nitrogen content
BS 770-8:1987 Methods for chemical analysis of cheese - Determination of nitrogen content (reference method)

International Organization for Standardization (ISO), 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 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 4945:1977 Steel; Determination of nitrogen content; Spectrophotometric method
ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric 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 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 10702:1993 Steel and iron; determination of nitrogen content; titrimetric method after distillation
ISO/FDIS 937 Meat and meat products — Determination of nitrogen content — Reference method
ISO/DIS 937 Meat and meat products — Determination of nitrogen content — Reference method
ISO 1656:2014 Rubber, raw natural, and rubber latex, natural - Determination of nitrogen content
ISO 5397:1984 | IULTCS/IUC 10 Leather — Determination of nitrogen content and "hide substance" — Titrimetric method
ISO 937:2023 Meat and meat products — Determination of nitrogen content — Reference method
ISO 8968-1:2001 | IDF 20-1: 2001 Milk — Determination of nitrogen content — Part 1: Kjeldahl method
ISO 4176:1981 Fertilizers; Determination of nitrate nitrogen content; Nitron gravimetric method
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 1592:1977 Urea for industrial use; Determination of nitrogen content; Titrimetric method after distillation
ISO 8603:1993 Solid fertilizers; determination of urea nitrogen content; gravimetric method using xanthydrol
ISO 5983:1979 Animal feeding stuffs; Determination of nitrogen content and calculation of crude protein content
ISO 3331:1975 Ammonium nitrate for industrial use — Determination of total nitrogen content — Titrimetric method after distillation
ISO 8968-2:2001 Milk - Determination of nitrogen content - Part 2: Block-digestion method (Macro method)
ISO 17997-2:2004 Milk - Determination of casein-nitrogen content - Part 2: Direct method
ISO 1871:1975 Agricultural food products; General directions for the determination of nitrogen by the Kjeldahl method
ISO 1656:1988 Rubber, raw natural, and rubber latex, natural; determination of nitrogen content
ISO 2991:1974 Nitric acid for industrial use; Determination of ammoniacal nitrogen content; Spectrophotometric method
ISO 17997-2:2004 | IDF 29-2:2004 Milk — Determination of casein-nitrogen content — Part 2: Direct method
ISO 8968-2:2001|IDF 20-2:2001 Determination of milk nitrogen content Part 2: Batch dissolution method (macroscopic method)
ISO 17997-2:2004|IDF 029-2:2004 Bovine Casein - Determination of Nitrogen Content Part 2: Direct Method
ISO 3188:1978 Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Titrimetric method
ISO/CD 29541:1976 Solid mineral fuels — Determination of total carbon, hydrogen and nitrogen content — Instrumental method
ISO 8968-2:2001 | IDF 20-2: 2001 Milk — Determination of nitrogen content — Part 2: Block-digestion method (Macro 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 15672:2000 Rubber and rubber additives - Determination of total nitrogen content using an automatic analyser
ISO 29541:2010 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental method
ISO 6853:1987 Photography; Processing waste; Determination of ammoniacal nitrogen content; Microdiffusion method
ISO 3330:1975 Ammonium nitrate for industrial use; Determination of ammoniacal nitrogen content; Titrimetric method after distillation
ISO 3332:1975 Ammonium sulphate for industrial use; Determination of ammoniacal nitrogen content; Titrimetric method after distillation
ISO 5397:1984 Leather; Determination of nitrogen content and "hide substance"; Titrimetric method
ISO 17997-1:2004 Milk - Determination of casein-nitrogen content - Part 1: Indirect method (Reference 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 5378:1978 Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Spectrophotometric method
ISO 1656:2019 Rubber, raw natural, and rubber latex, natural — Determination of nitrogen content
ISO 17997-1:2004 | IDF 29-1:2004 Milk — Determination of casein-nitrogen content — Part 1: Indirect method (Reference method)

RO-ASRO, nitrogen content

STAS 6843-1982 STEELS ANI) CAST 1RONS Determination of nitrogen content
STAS 6182/4-1979 WINE Determination of total nitrogen content
STAS 7425-1979 NITROCELLULOSES Determination of nitrogen content
STAS SR 12271-6-1994
STAS 8613/6-1980 CONCENTRATED FOODSTUFF Determination of nitrogen content
SR ISO 4176:1981 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method
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
SR ISO 5314:1981 Fertilizers. Determination of ammoniaca! nitrogen content Titrimetric method after distillation
STAS SR 13257-1996 COFFEE Determination of nitrogen content by the Kjeldahi method Spectrophotometric method
SR ISO 5313:1986 High nitrogen content, straight ammonium nitrate fertilizers. Determination of oil retention
STAS 9065/7-1974 MEAT AND MEAT PRODUCTS Determination of easyly hydrolisable nitrogen content
STAS SR 13325-1995 Animal feeding stuffs - Determination of total nitrogen content and calculation of crude protein content
SR 184-25-1998 Ethyl alcohol. Determination of ammonia and azotic bases nitrogen content
STAS 7184/2-1985 SOILS Nitrogen content determination
STAS SR ISO 3188:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method-Titrimetric method
STAS SR 9763-13-1996 Spices and condiments. Determination of nitrogen content by the Kjeldahl method. Spectrophotometric method

RU-GOST R, nitrogen content

GOST 8775.4-1987 Lithium. Method of determination of nitrogen
GOST 21600.6-1983 Ferrochrome. Method for the determination of nitrogen
GOST 20851.1-1975 Mineral fertilizers. Methods for determination of nitrogen content
GOST 34111-2017 Juice products. Determination of nitrogen content by Kjeldahl method
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 22720.4-1977 Rare metals and their alloys. Method for the determination of nitrogen
GOST R 51438-1999 Fruit and vegetable juices. Kjeldahl method for determination of nitrogen content
GOST R 55282-2012 Raw milk. The colorimetric method of urea content determination
GOST R 50568.1-1993 Urea for industrial use. Determination of nitrogen content. Titrimetric method after distillation
GOST R 54234-2010 Solid recovered fuels. Determination of carbon, hydrogen and nitrogen content by instrument methods
GOST 32467-2013 Urea for industrial use. Determination of nitrogen content. Titrimetric method after distillation
GOST R ISO 1656-2017 Raw natural rubber and natural rubber latex. Determination of nitrogen content
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 EN 15561-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide containing nitrates
GOST R 57571-2017 Hardeners for epoxide resins. Determination of primary, secondary and tertiary amine group nitrogen content
GOST R 55246-2012 Milk and milk products. Determination of non-protein nitrogen content by Kjeldahl method
GOST EN 15560-2013 Fertilizers. Determination of total nitrogen in calcium cyanamide nitrate free
GOST 27894.3-1988 Peat and products of its proccesing for agriculture. Methods for determination of ammonia nitrogen
GOST R 53219-2008 Soil quality. Determination of nitrogen in air-dry soils using calcium chloride solution
GOST 30181.3-1994 Mineral fertilizers. Method for determination of mass fraction of nitrogen in fertilizers with nitrate nitrogen
GOST 29302-1992 Ammonium nitrate for industrial use. Method for determination of total nitrogen content (titrimetric) after distillation
GOST 30181.8-1994 Mineral fertilizers. Method for determination of mass fraction of ammonium nitrogen in compound fertilizers (chloramine method)

Association Francaise de Normalisation, nitrogen content

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 V59-202:1988 Collagenes. Determination of the nitrogen content.
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 U42-141:1984 Fertilizers. Determination of nitrate nitrogen content. Nitrogen gravimetric method.
NF U42-416*NF EN 15478:2009 Fertilizers - Determination of total nitrogen in urea.
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 ISO 27871:2011 Fromages et fromages fondus - Détermination des fractions azotées
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 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.
XP U42-730*XP CEN/TS 17771:2022 Organic and organo-mineral fertilizers - Determination of the nitrogen content
XP CEN/TS 17771:2022 Engrais organiques et organo-minéraux - Détermination de la teneur en azote
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 X43-009:1973 Nitrogen dioxyde content of the atmosphere (griess saltzman reaction).
NF V76-134*NF EN 12135:1997 Fruit and vegetable juices. Determination of nitrogen content. Kjeldahl method.
NF EN ISO 16948:2015 Biocombustibles solides - Détermination de la teneur totale en carbone, hydrogène et azote
NF X43-018:1983 Air pollution. Measurement of nitrogen oxides by chemiluminescence.
NF T43-106:1990 Rubber, raw natural, and rubber latex, natural. Determination of nitrogen content.
NF T20-286:1982 Nitric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method.
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 T73-281*NF EN 13560:2002 Surface active agents - Determination of amide nitrogen content - Potentiometric titration.
NF U44-310-2*NF EN 13654-2:2002 Soil improvers and growing media - Determination of nitrogen - Part 2 : Dumas method.
NF A06-654:2020 Chemical analysis of titnium and titanium alloys - Determination of nitrogen content - Titrimetric method
NF EN 13716:2002 Agents de surface - Détermination de la teneur en azote total basique - Titrage potentiométrique
NF ISO 13878:1998 Qualité du sol - Détermination de la teneur totale en azote par combustion sèche ("analyse élémentaire")
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 U42-146*NF EN 15560:2009 Fertilizers - Determination of total nitrogen in calcium cyanamide nitrate free.
NF V03-750:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method.
NF EN 13560:2002 Agents de surface - Détermination de la teneur en azote sous forme amide - Titrage potentiométrique
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 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 V03-608*NF EN ISO 5378:1994 Starches and derived products. Determination of nitrogen content by the kjeldahl method. Spectrophotometric method.
NF T43-106*NF ISO 1656:2019 Rubber, raw natural, and rubber latex, natural - Determination of nitrogen content

International Dairy Federation (IDF), 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
IDF 20-2-2001 Milk - Determination of nitrogen content - Part 2: Block-digestion method (Macro method)

Danish Standards Foundation, 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 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method
DS/EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
DS/EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method
DS/ISO 17997-2:2004 Milk - Determination of casein-nitrogen content - Part 2: Direct method
DS/EN 13560/AC:2003 Surface active agents - Determination of amide nitrogen content - Potentiometric titration
DS/EN 13560:2002 Surface active agents - Determination of amide nitrogen content - Potentiometric titration
DS/EN ISO 20483:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
DS/ISO 29541:2011 Solid mineral fuels - Determination of total carbon, hydrogen and nitrogen content - Instrumental method
DS/EN ISO 3188:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method
DS/EN ISO 8968-2:2002 Milk - Determination of nitrogen content - Part 2: Block-digestion method (Macro method)
DS/ISO 17997-1:2004 Milk - Determination of casein-nitrogen content - Part 1: Indirect method (Reference method)

NL-NEN, nitrogen content

NEN 6642-1992 Water-Calculation of total nitrogen content

PT-IPQ, nitrogen content

NP 3646-1987
NP EN 12135-2000 Fruit and vegetable juices Determination of nitrogen content Kjeldahl method
NP 1841-1985

Professional Standard - Agriculture, nitrogen content

NY/T 2542-2014 Fertilizers.Determination of total nitrogen content
GB 8088-1987 Determination of Nitrogen Content in Natural Raw Rubber
GB 8572-1988 Determination of total nitrogen content in compound fertilizer
NY/T 2419-2013 Determination of total nitrogen in plant.Automatic kjeldahl apparatus method
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
GB 3598-1983 Determination of Urea Nitrogen Content in Fertilizers Urease Method
GB/T 42955-2023 Determination of total nitrogen content in fertilizers Dumas combustion method
GB 3595-1983 Determination of ammonia nitrogen content in fertilizers Titration method after distillation
NY/T 1116-2006 Fertilizers-Determination of nitrate nitrogen content.UItraviolet spectro-photometric method
GB 10511-1989 Determination of total nitrogen content in nitrophosphate fertilizers Titration after distillation

Indonesia Standards, nitrogen content

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 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 4146-2013

CZ-CSN, nitrogen content

CSN 65 0331-1963 Deterimination oí Nierogea by Kjeldahl's method
CSN 65 4814-1976 Determinaíion of nitrogen oontent in fertilizers
CSN 62 3008-1986 Natural raw rubber in blocks. Determination of nitrogen content
CSN 42 0566 Cast.7-1987 Chemical analysis of manganese. Determination of nitrogen content
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 56 0020-1987 General directions for the determination f nitrogen by the Kjeldahl method
CSN 70 4243-1981 Glass apparatus by Parnas-Wagner for the determination of nitrogen
CSN ISO 1871:1994 Agricultural food products-General directions for the determination of nitrogen by the Kjeldahl method
CSN 66 8027-1957
CSN 72 2030 Cast.4-1992 Chemical analysis of blast furnace slag. Determination of barium oxide content

HU-MSZT, nitrogen content

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

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 D 1811-2003 Methods for determination of nitrogen in iron and steel
KS M 8531-2004 Sodium hydroxide for nitrogen compounds analysis
KS D ISO 4945:2002 Steel－Determination of nitrogen content－Spectrophotometric method
KS M ISO 4176-2006(2011) Fertilizers－Determination of nitrate nitrogen content－Nitron gravimetric 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 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 M ISO 5397:2002 Leather－Determination of nitrogen content and “hide substance”－Titrimetric method
KS M 2112-2011 Crude petroleum and petroleum products-Determination of nitrogen content
KS M ISO 1656:2010 Rubber, raw natural, and rubber latex, natural-Determination of nitrogen content
KS M ISO 1656:2015 Rubber, raw natural, and rubber latex, natural－Determination of nitrogen content
KS M ISO 5314-2007(2012) Fertilizers－Determination of ammoniacal nitrogen content－Titrimetric method after distillation
KS M 1922-2002(2007) Urea for industrial use－Determination of nitrogen content－Titrimetric method after distillation
KS M ISO 4176:2012 Fertilizers－Determination of nitrate nitrogen content－Nitron gravimetric method
KS M ISO 5397-2002(2017) Leather－Determination of nitrogen content and “hide substance”－Titrimetric method
KS M ISO 5397-2002(2022) Leather－Determination of nitrogen content and “hide substance”－Titrimetric method
KS M 1922-2009 Urea for industrial use－Determination of nitrogen content－Titrimetric method after distillation
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 1871:2013 Agricultural food products ― General directions for the determination of nitrogen by the Kjeldahl method
KS H ISO 1871:2008 Agricultural food products-General directions for the determination of nitrogen by the Kjeldahl method
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 H ISO 5378-2008(2018) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS H ISO 3188:2008 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Titrimetric method
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 9702-2002(2017) Plastics－Amine epoxide hardners－Determination of primary, secondary and tertiary amine group nitrogen content
KS M ISO 3332:2012 Ammonium sulphate for industrial use－Determination of ammoniacal nitrogen content－Titrimetric method after distillation
KS M ISO 15672:2007 Rubber and rubber additives－Determination of total nitrogen content using an automatic analyser
KS M ISO 3332-2017(2022) Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
KS M ISO 9702-2002(2022) Plastics－Amine epoxide hardners－Determination of primary, secondary and tertiary amine group nitrogen content
KS M ISO 15672-2007(2017) Rubber and rubber additives－Determination of total nitrogen content using an automatic analyser
KS M ISO 3332:2017 Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
KS H ISO 5378:2008 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS M ISO 15672-2007(2022) Rubber and rubber additives－Determination of total nitrogen content using an automatic analyser
KS M ISO 1656:2021 Rubber, raw natural, and rubber latex, natural —Determination of nitrogen content

Lithuanian Standards Office , 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 12135-2001 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
LST EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
LST EN 13560-2002 Surface active agents - Determination of amide nitrogen content - Potentiometric titration
LST EN 13560-2002/AC-2003 Surface active agents - Determination of amide nitrogen content - Potentiometric titration
LST EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method (ISO 8968-1:2001)
LST ISO 937:2000 Meat and meat products. Determination of nitrogen content (Reference method) (idt ISO 937:1978(E))
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)

VN-TCVN, nitrogen content

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 6014-2007 Hard coal.Determination of nitrogen.Semi-micro Kjeldahl method
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 7373-2004 Soils quality.Index values of total nitrogen content in the soils of Vietnam
TCVN 6645-2000 Soil quality.Determination of total nitrogen content by dry combustion ("elemental analysis")
TCVN 6091-2016 Rubber,raw natural,and rubber latex,natural - Determination of nitrogen content

VE-FONDONORMA, nitrogen content

NORVEN 378

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

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 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 3597-2002 Fertilizer--Determination of nitrate nitrogen content--Nitron gravimetric method
GB/T 2441.1-2001 Determination of urea-Determination of total nitrogen content
GB/T 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 2441.1-2008 Determination of urea.Part 1:Total nitrogen content
GB/T 21704-2008 Determination of non-protein-nitrogen content in milk and dairy products
GB/T 8088-2008 Rubber,raw natural and rubber latex,natural.Determination of nitrogen content
GB/T 24583.3-2009 Vanadium-Nitrogen alloy.Determination of nitrogen content.The distillation-neutralization titration method
GB/T 3598-1983 Fertilizers--Determination of urea nitrogen content--Urease method
GB/T 23835.12-2009 Lithium perchlorate anhydrous.Part 12:Determination of total nitrogen content
GB/T 17767.1-1999 Determination of total nitrogen content for organic-inorganic compound fertilizers
GB/T 3595-2000 Fertilizers-Determination of ammoniacal nitrogen content-Titrimetric method after distillation
GB/T 42263-2022 Determination of nitrogen content in silicon single crystal—Secondary ion mass spectrometry method
GB/T 17674-2012 Determination of nitrogen in crude oil by boat-inlet chemiluminescence
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 17674-1999 Determination of nitrogen in petroleum and petroleum products by chemiluminescence method
GB/T 8572-2001 Determination of total nitrogen content for compound fertilizers-Titrimetric method after distillation
GB/T 10511-1989 The determination of total nitrogen content for nitrophosphate titrimetric method after distillation
GB/T 10511-2008 Determination of tatal nitrogen content for nitrophosphate.Titrimetric method after distillation
GB/T 41964-2022 Photography—Processing waste—Determination of ammoniacal nitrogen (microdiffusion method)
GB/T 8572-2010 Determination of total nitrogen content for compound fertilizers titrimetric method after distillation
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 5511-2008 Cereals and pulses.Determination of the nitrogen content and calculation of the crude protein content.Kjeldahl method
GB/T 10209.1-2001 Determination of total nitrogen content for monoammonium phosphate and diammonium phosphate(Titrimetric method after distillation)
GB/T 10209.1-2008 Determination of monoammonium phosphate and diammonium phosphate.Part 1:Total nitrogen content
GB/T 17767.1-2008 Determination of organic-inorganic compound fertilizers.Part 1:Total nitrogen content
GB 9170-1988 Determination method of total nitrogen content in lubricating oil and fuel oil (improved Kjeldahl method)
GB/T 9170-1988 Lubricating oils and fuel oils--Determination of total nitrogen--Modified kjeldahl method
GB/T 20124-2006 Steel and iron - Determination of nitrogen content - Thermal conductimetric method after fusion in a current of inert gas (Routine method)

Japanese Industrial Standards Committee (JISC), nitrogen content

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 2609:1998 Crude petroleum and petroleum products -- Determination of nitrogen content
JIS K 0104:2000 Methods for determination of nitrogen oxides in flue gas
JIS G 1228 AMD 1:2006 Iron and steel -- Methods for determination of nitrogen content (Amendment 1)
JIS K 0104:2011 Methods for determination of nitrogen oxides in flue gas
JIS K 6558-6:2016 Leather -- Determination of nitrogen content and "hide substance" -- Titrimetric method
JIS G 1311-7:2012 Method for chemical analysis of ferromanganese -- Part 7: Determination of nitrogen content
JIS G 1313-6:2012 Method for chemical analysis of ferrochromium .Part 6: Determination of nitrogen content

AR-IRAM, nitrogen content

IRAM 14 522-1961

YU-JUS, nitrogen content

JUS H.B8.288-1983 Fertilizers. Determination of content total-nitrogen. Volumetric method
JUS H.F8.132-1986 Gases. Determination of nitrogen content. Gas chromatographic method
JUS H.G8.083-1983 Reagents. Sodium chloride. Determination of total nitrogen content. Colorimetric method
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.G8.104-1984 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
JUS H.G8.489-1991 Reagents. Potassium permanganate. Determination of total nitrogen content. Colorimetric method
JUS H.B8.287-1983 Fertilizers. Determination of content amid-nitrogen. Spectrophotometric method
JUS H.G8.514-1991 Reagents. Potassium hydroxide. Determination of total nitrogen content. Colorimetric method
JUS H.G8.298-1987 Reagents. Oxaiic acid dihydrate. Determination of total nitrogen content. Colorimetric metbod
JUS H.B8.637-1981 Sulphuric acid for industrial use. Determination of ammoniacal nitrogen content. Spectrophotometric method
JUS H.G8.261-1987 Reagents. Barium chloride dihydrate. Determination of total nitrogen content. Colorimetric method
JUS E.Z8.017-1993 Soups,broaths,sauces and seasonings -Determination of the α-amino nitrogen content
JUS H.G8.064-1983 Reagents. Copper sulphate pentahydrate. Determination of total nitrogen content. Colorimetric method
JUS H.G8.467-1991 Reagents.Nickel(II) sulphate x-hydrate.Determination of total nitrogen content.Colorimetric method
JUS H.B8.812-1992 High nitrogen content,straight ammonium nitrate fertilizers - Determination of oil retention (porosity)
JUS H.G8.280-1987 Reagents. lron(ll)sulphate heptahydrate. Determination of total nitrogen content. Colorimetric method
JUS B.H8.320-1988 Methods of analysis of coal and coke. Determination of nitrogen ccmtent - Makro Kjeldahl nethod
JUS H.G8.158-1984 Reagents. Sodium carbonate anhydrous and sodium carbonate decahydrate. Determination of total ni-trogen contont. Colorimetric method

TN-INNORPI, nitrogen content

NT 14.33-1983

FI-SFS, 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), nitrogen content

NSF 245A-2010 Wastewater Treatment Systems - Nitrogen Reduction

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

GB/T 38395-2019 Coal tar—Determination of sulfur and nitrogen content
GB/T 24583.3-2019 Vanadium-nitrogen—Determination of nitrogen content—Distillation-neutralization titration method
GB/T 37588-2019 Carbon materials—Determination of nitrogen content—Dumas combustion method
GB/T 17674-2021 Determination of nitrogen in crude oil—Boat-inlet chemiluminescence
GB/T 40723-2021 Rubber—Determination the contents of total sulfur and total nitrogen — Automatic analyser method
GB/T 24583.2-2019 Vanadium-nitrogen—Determination of nitrogen content—Thermal conductimetric method after fusion in a current of inert gas
GB/T 40535.1-2021 Test methods of continuous nitride ceramic fibers—Part 1：Nitrogen content

PL-PKN, nitrogen content

PN C04576 ArkusZ14-1973 Water and w?sie water Tes?s for nitrogen Calcula?ion of to?al nitrogen
PN Z04075-1961 Speedy Me?hod for De?er mina?ion of Ni?rogen Oxyde* in Air
PN P22117-1992 Leathers. Determination of nitrogen content ammonium salts and "hide substance"
PN H04206-06-1986 Chemical analysis of ferro-alloys Ferroehrom Determination of nitrogen content
PN A79528-17-1993 Spirit (ethyl alcohol). Methods of tests. Determination of voltile nitrogen basen content
PN A86026-1990 Milk and dairy products Milk powdcr Determination of nitritc and nitrate contents

Professional Standard - Commodity Inspection, nitrogen content

SN/T 0840-2015 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
SN/T 3097-2012 Determination of total nitrogen in fertelezers.Combustion
SN/T 0541.5-2009 Inspecting method of import and export standard rubber.Determination of nitrogen content
SN/T 3382-2012 Determination of non-protein-nitrogen content in milk and dairy products for export
SN/T 0736.11-2002 Chemical analysis of fertilizers for import and export.Determination of nitrogen content by auto analyzer
SN/T 0736.5-2010 Test method of import and export fertilizers.Part 5: Determination of nitrogen content
SN/T 3810-2014 Determination of nitrogen content in urea and ammonium sulphate.X-ray fluorescence spectrometry

BE-NBN, nitrogen content

NBN V 21-003-1987 Milk - Determination of nitrogen content - Kjeldahl method
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 T 03-041-1979 Nitric acid for industrial use - Determination of ammoniacal nitrogen content - Spectrophotometric method
NBN T 03-069-1979 Ammonium sulphate for industrial use - Determination of ammoniacal nitrogen content - Titrimetric method after distillation

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

ASTM D3533-90(1995)e1 Standard Method of Rubber8212;Nitrogen Content
ASTM D3533-90(2001) Standard Test Method for Rubber8212;Nitrogen Content
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 D1607-91(2000)e1 Standard Test Method for Nitrogen Dioxide Content of the Atmosphere (Griess-Saltzman Reaction)
ASTM D6016-96 Standard Test Method for Determination of Nitrogen, Water Extractable in Leather
ASTM D6016-96(2001) Standard Test Method for Determination of Nitrogen, Water Extractable in Leather
ASTM D1607-91(2018)e1 Standard Test Method for Nitrogen Dioxide Content of the Atmosphere (Griess-Saltzman Reaction)

CEN - European Committee for Standardization, nitrogen content

EN ISO 4945:2018 Steel - Determination of nitrogen - Spectrophotometric method
EN ISO 8968-4:2001 Milk - Determination of Nitrogen Content - Part 4: Determination of Non-Protein Nitrogen Content
EN ISO 8968-2:2001 Milk - Determination of Nitrogen Content - Part 2: Block-Digestion Method (Macro Method)

European Committee for Standardization (CEN), nitrogen content

EN ISO 4945:2009 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
FprCEN/TS 17771-2021 Organic and organo-mineral fertilizers - Determination of the nitrogen content
CEN/TS 17771:2022 Organic and organo-mineral fertilizers - Determination of the nitrogen content
EN ISO 8968-5:2001 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content (ISO 8968-5:2001)
EN 15476:2009 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
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 12135:1997 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
EN 14891:2012 Liquid-applied water impermeable products for use beneath ceramic tiling bonded with adhesives - Requirements, test methods, evaluation of conformity, classification and designation (Incorporating Corrigendum November 2012)

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

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

ZA-SANS, nitrogen content

SANS 8968-5:2006 Milk - Determination of nitrogen content - Part 5: Determination of protein-nitrogen content
SANS 333:1996 Coal - Determination of nitrogen - Semi-micro Kjeldahl method
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

Professional Standard - Aerospace, 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

AENOR, nitrogen content

UNE-EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
UNE-EN ISO 4945:2010 Steel - Determination of nitrogen content - Spectrophotometric method (ISO 4945:1977)
UNE 59018:1986 LEATHER. DETERMINATION OF NITROGEN CONTENT AND "HIDE SUBSTANCE". TITRIMETRIC METHOD
UNE-EN 13560:2002 Surface active agents - Determination of amide nitrogen content - Potentiometric titration
UNE 77325:2003 Soil quality. Determination of total nitrogen content by dry combustion ("elemental analysis").
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)

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, nitrogen content

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

工业和信息化部, nitrogen content

YB/T 4582.7-2017 Determination of total nitrogen content of ferrous silicon nitride by neutralization titration method
YB/T 4565-2016 Determination of titanium iron nitrogen content by inert gas melting thermal conductivity method
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 4566.2-2016 Determination of nitrogen content of vanadium iron nitride, distillation and separation-acid-base neutralization titration method
YB/T 4528-2016 Determination of nitrogen content in ferrochromium nitride and high nitrogen ferrochrome by inert gas melting thermal conductivity method

Professional Standard - Petrochemical Industry, nitrogen content

SH/T 0413-1992 Determination of Trace Basic Nitrogen Content in Liquid Paraffin
SH/T 0224-1992 Determination of Nitrogen Content in Petroleum Additives (Kirsch method)
SH/T 0171-1992 Method for Determination of Nitrogen Content in Petroleum and Petroleum Products (Thymol Colorimetric Method)

ES-UNE, nitrogen content

UNE-CEN/TS 17771:2022 Organic and organo-mineral fertilizers - Determination of the 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)
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-EN 13560/AC:2003 Surface active agents - Determination of amide nitrogen content - Potentiometric titration.
UNE-CEN/TS 17760:2022 Inorganic fertilizers - Determination of particle size of 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-CEN/TS 17759:2022 Inorganic fertilizers - Determination of pH of a solution of ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)
UNE-CEN/TS 17751:2022 Inorganic fertilizers - Determination of specific parameters in ammonium nitrate fertilizers of high nitrogen content (Endorsed by Asociación Española de Normalización in May of 2022.)

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

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

Professional Standard - Ferrous Metallurgy, 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

ES-AENOR, nitrogen content

UNE 59-018-1986

未注明发布机构, nitrogen content

BS 4267-2:1988(1999) Ammonium nitrate — Part 2 : Method for determination of total nitrogen content
BS 4267-1:1988(1999) Ammonium nitrate — Part 1 : Method for determination of ammoniacal nitrogen content
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)
BS EN ISO 8968-2:2002 Milk — Determination ofnitrogen content — Part 2 : Block - digestion method (Macro method)

Standard Association of Australia （SAA）, 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)

TR-TSE, nitrogen content

TS 2466-1976 Nitric Acit For Industrial Use Determination of Ammoniacal Nitrogen Content Spectrophotoraetric Method

PH-BPS, nitrogen content

PTS 83-1970 Method of Test for the Determination of Nitrogen Content of Nitrate-Free Fertilizers

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

T/GXAS 477-2023 Determination of total nitrogen content in sugarcane juice —sulphuric acid titrimetric method
T/NXCL 023-2023 Determination of hydrogen and nitrogen in Beryllium— Inert gas fusion infrared absorption/ thermal conductivity method

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

DB12/T 1023-2020 Determination of total nitrogen content in organic fertilizers Dumas combustion method

KR-KS, nitrogen content

KS M ISO 8603-2007 Solid fertilizers－Determination of urea nitrogen content－Gravimetric method using xanthydrol
KS M ISO 3332-2017 Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
KS M ISO 1656-2021 Rubber, raw natural, and rubber latex, natural —Determination of nitrogen content

BG-BDS, nitrogen content

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

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

DB41/T 1704-2018 Determination of total nitrogen content in compound fertilizers Dumas combustion method

国家能源局, nitrogen content

NB/SH/T 0980-2019 Determination of basic nitrogen content in petroleum fractions by potentiometric titration method

Professional Standard - Energy, nitrogen content

NB/SH/T 0162-2021 Color indicator method for determination of basic nitrogen content in petroleum distillates

SE-SIS, nitrogen content

SIS SS 02 81 33-1991 Determination of the sum of the nitrite and nitrate nitrogen content of water
SIS SS 02 81 01-1992 Nitrogen content of water — Determination with Kjeldahl method after reduction with Devarda's alloy

TH-TISI, nitrogen content

TIS 1771-1999 Ammonium sulphate for industrial use.determination of ammoniacal nitrogen content.titrimetric method after distillation

IN-BIS, nitrogen content

IS 5960 Pt.1-1970

Professional Standard - Aviation, nitrogen content

HB 5297.25-2001 Methods of chemical analysis of titanium alloys - Determination of nitrogen content by steam distillation

NO-SN, nitrogen content

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

American National Standards Institute （ANSI), nitrogen content

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