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Determination principle of Kjeldahl method

Determination principle of Kjeldahl method, Total:220 items.

In the international standard classification, Determination principle of Kjeldahl method involves: Coals, Water quality, Milk and milk products, Fruits. Vegetables, Animal feeding stuffs, Soil quality. Pedology, External water conveyance systems, Beverages, Sugar. Sugar products. Starch, Analytical chemistry, Wastes, General methods of tests and analysis for food products, Cereals, pulses and derived products, Photography, Fertilizers, Organic chemicals, Lubricants, industrial oils and related products, Tea. Coffee. Cocoa, Food products in general, Raw materials for rubber and plastics, Plastics, Leather technology, Metalliferous minerals.

Danish Standards Foundation, Determination principle of Kjeldahl method

DS 242:1988 Water quality. Kjeldahl-nitrogen. 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/ISO 5663:1994 Water quality - Determination of Kjeldahl nitrogen - Method after mineralization with selenium
DS/EN 25663:1994 Water quality-Determination of Kjeldahl nitrogen-Method after mineralization with selenium
DS/EN ISO 3188:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method
DS/EN 13342:2001 Characterisation of sludges - Determination of total Kjeldahl nitrogen
DS/ISO 1871:2009 Food and feed products - General guidelines for the determination of nitrogen by the Kjeldahl method
DS/EN ISO 5378:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophometric method
DS/EN 16169:2012 Sludge, treated biowaste and soil - Determination of Kjeldahl nitrogen
DS/EN ISO 20483:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
DS/EN 13654-1:2002 Soil improvers and growing media - Determination of nitrogen - Part 1: Modified 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 8988:2007 Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method

IN-BIS, Determination principle of Kjeldahl method

IS 5194-1969

SE-SIS, Determination principle of Kjeldahl method

SIS SS 18 71 63-1984 Coal - Determination of nitrogen - Macro Kjeldahl method
SIS SS 02 81 01-1992 Nitrogen content of water — Determination with Kjeldahl method after reduction with Devarda's alloy

International Organization for Standardization (ISO), Determination principle of Kjeldahl method

ISO 332:1981 Coal — Determination of nitrogen — Macro Kjeldahl method
ISO 332:1974 Title missing - Legacy paper document
ISO 8968-1:2001 | IDF 20-1: 2001 Milk — Determination of nitrogen content — Part 1: Kjeldahl method
ISO 8968-1:2014 | IDF 20-1:2014 Milk and milk products — Determination of nitrogen content — Part 1: Kjeldahl principle and crude protein calculation
ISO 5663:1984 Water quality; Determination of Kjeldahl nitrogen; Method after mineralization with selenium
ISO 3188:1978 Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Titrimetric 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 8968-1:2014 Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation
ISO 1871:1975 Agricultural food products; General directions for the determination of nitrogen by the Kjeldahl method
ISO 5378:1978 Starches and derived products; Determination of nitrogen content by the Kjeldahl method; Spectrophotometric method
ISO 11261:1995 Soil quality - Determination of total nitrogen - Modified Kjeldahl method
ISO 24698-2:2008 Rubber, raw - Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber (NBR) - Part 2: Kjeldahl method
ISO 333:1996 Coal - Determination of nitrogen - Semi-micro Kjeldahl method

Group Standards of the People's Republic of China, Determination principle of Kjeldahl method

T/QAS 071-2021 Determination of total nitrogen in brine Kjeldahl method
T/NAIA 044-2021 Urine Total Nitrogen Determination in Livestock Kjeldahl Method
T/NAIA 001-2020 Determination of ammoniacal nitrogen in fermented feed Kjeldahl method
T/NAIA 060-2021 Determination of true protein in feed Kjeldahl method
T/NAIA 0139-2022 Diesel engine nitrogen oxide reducing agent urea aqueous solution (AUS 32) Determination of urea content Automatic Kjeldahl method

Association Francaise de Normalisation, Determination principle of Kjeldahl method

NF V04-211:1971 MILK. DETERMINATION OF TOTAL NITROGEN CONTENT. (KJELDAHL METHOD).
NF EN 12135:1997 Jus de fruits et de légumes - Dosage de l'azote - Méthode de Kjeldahl.
NF EN ISO 3188:1994 Amidons, fécules et produits dérivés - Dosage de l'azote selon la méthode de Kjeldahl - Méthode titrimétrique.
NF V04-221-1*NF EN ISO 8968-1:2014 Milk and milk products - Determination of nitrogen content - Part 1 : Kjeldahl principle and crude protein calculation
NF EN 13342:2000 Caractérisation des boues - Détermination de l'azote Kjeldahl
NF ISO 11261:1995 Qualité du sol - Dosage de l'azote total - Méthode de Kjeldahl modifiée.
NF X31-111*NF ISO 11261:1995 Soil quality. Determination of total nitrogen. Modified kjeldahl method.
NF ISO 1871:2009 Produits alimentaires et aliments des animaux - Lignes directrices générales pour le dosage de l'azote selon la méthode de Kjeldahl
NF EN 16169:2012 Boues, biodéchets traités et sols - Détermination de l'azote Kjeldahl
NF EN 25663:1994 Qualité de l'eau - Dosage de l'azote Kjeldahl - Méthode après minéralisation au sélénium
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 EN 13654-1:2002 Amendements du sol et supports de culture - Détermination de l'azote - Partie 1 : méthode de Kjeldahl modifiée
NF V03-050:1970 Agricultural food products. General directions for the determination of nitrogen with mineralization by the jkeldahl 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 V03-750:2007 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method.
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 EN ISO 5378:1994 Amidons, fécules et produits dérivés - Dosage de l'azote selon la méthode de Kjeldahl - Méthode spectrophotométrique.
NF EN ISO 8988:2006 Plastiques - Résines phénoliques - Détermination de la teneur en hexaméthylènetétramine - Méthode Kjeldahl, méthode à l'acide perchlorique et méthode à l'acide chlorhydrique
NF X31-037*NF EN 16169:2012 Sludge, treated biowaste and soil - Determination of Kjeldahl nitrogen.

Korean Agency for Technology and Standards (KATS), Determination principle of Kjeldahl method

KS E ISO 333-2003(2013) Coal－Determination of nitrogen－Semi-micro Kjeldahl method
KS I ISO 11261-2008(2018) Soil quality－Determination of total nitrogen－Modified Kjeldahl method
KS I ISO 11261-2008(2021) Soil quality－Determination of total nitrogen－Modified 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 5663-2007(2017) Water quality－Determination of Kjeldahl nitrogen－Method after mineralization with selenuium
KS H ISO 5378-2008(2018) Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS M ISO 6851-2002(2017) Photography－Processing waste－Determination of total amino nitrogen－Microdiffusion Kjeldahl method
KS I ISO 5663:2007 Water quality－Determination of Kjeldahl nitrogen－Method after mineralization with selenuium
KS H ISO 3188:2008 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Titrimetric method
KS H ISO 1871-2013(2018) Agricultural food products ― General directions for the determination of nitrogen by the Kjeldahl method
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 5378:2008 Starches and derived products－Determination of nitrogen content by the Kjeldahl method－Spectrophotometric method
KS M ISO 8988-2010(2020) Plastics－Phenolic resins－Determination of hexamethylenetetramine content－Kjeldahl method, perchloric acid method and hydrochloric acid method
KS M ISO 24698-2:2010 Rubber, raw－Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber(NBR)－Part 2：Kjeldahl method
KS I ISO 11261:2008 Soil quality-Determination of total nitrogen-Modified Kjeldahl method

RU-GOST R, Determination principle of Kjeldahl method

GOST 34111-2017 Juice products. Determination of nitrogen content by Kjeldahl method
GOST R 55246-2012 Milk and milk products. Determination of non-protein nitrogen content by Kjeldahl method
GOST 26889-1986 Food-stuffs and food additives. General directions for the determinations of nitrogen content by the Kjeldahl method
GOST ISO/TS 17837-2013 Processed cheese products. Determination of nitrogen content and crude protein calculation. Kjeldahl method

Jilin Provincial Standard of the People's Republic of China, Determination principle of Kjeldahl method

DB22/T 1932-2013 Determination method of total nitrogen content in peat (Kjeldahl method)
DB22/T 1995-2014 Determination of feed grade choline chloride content Kjeldahl method

VN-TCVN, Determination principle of Kjeldahl method

TCVN 6498-1999 Soil quality.Determination of total nitrogen.Modifierd Kejldahl method
TCVN 6014-2007 Hard coal.Determination of nitrogen.Semi-micro Kjeldahl method
TCVN 5987-1995 Water quality.Determination of Kjeldahl nitrogen.Method after mineralization with selenium
TCVN 4328-1-2007 Animal feeding stuffs.Determination of nitrogen content and calculation of crude protein content.Part 1: Kjeldahl method
TCVN 6638-2000 Water quality.Determination of nitrogen.Catalytic digestion after reduction with devarda's alloy

ZA-SANS, Determination principle of Kjeldahl method

SANS 333:1996 Coal - Determination of nitrogen - Semi-micro Kjeldahl method
SANS 8968-1:2006 Milk - Determination of nitrogen content Part 1: Kjeldahl method

Association of Official Analytical Chemists (AOAC), Determination principle of Kjeldahl method

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

Ningxia Provincial Standard of the People's Republic of China, Determination principle of Kjeldahl method

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

PL-PKN, Determination principle of Kjeldahl method

PN C04576 ArkusZ12-1973 Water and waste water Tests for nitrogenDetermination of total nitrogen of Kjeldahl
PN C04576 ArkusZ01-1973 Water and waste water Tests for nitrogen Determination of ammonium nitrogen by colorimetric method with Nessler reagent

中华人民共和国环境保护部, Determination principle of Kjeldahl method

GB 11891-1989 Water quality-Determination of Kjeldahl nitrogen

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, Determination principle of Kjeldahl method

GB/T 11891-1989 Water quality--Determination of Kjeldahl nitrogen
GB/T 41965-2022 Photography—Processing waste—Determination of total amino nitrogen(microdiffusion Kjeldahl method)
GB/T 5511-2008 Cereals and pulses.Determination of the nitrogen content and calculation of the crude protein content.Kjeldahl method

BE-NBN, Determination principle of Kjeldahl method

NBN T 91-255-1976 Water analysis methods - Determination of the ammoniacal and organic nitrogen - (Kjeldahl nitrogen)
NBN-EN ISO 5378:1994 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)

CZ-CSN, Determination principle of Kjeldahl method

CSN 56 0020-1987 General directions for the determination f nitrogen by the Kjeldahl method
CSN ISO 1871:1994 Agricultural food products-General directions for the determination of nitrogen by the Kjeldahl method
CSN 70 4243-1981 Glass apparatus by Parnas-Wagner for the determination of nitrogen

Indonesia Standards, Determination principle of Kjeldahl method

SNI 4146-2013

British Standards Institution (BSI), Determination principle of Kjeldahl method

BS ISO 6851:2001 Photography. Processing waste. Determination of total amino nitrogen (microdiffusion Kjeldahl method)
BS 7755-3.7:1995 Soil quality. Chemical methods. Determination of total nitrogen. Modified Kjeldahl method
BS EN ISO 8968-1:2014 Milk and milk products. Determination of nitrogen content. Kjeldahl principle and crude protein calculation
DD ISO/TS 17837:2008 Milk and milk products. Determination of nitrogen content and crude protein calculation. Kjeldahl method
BS EN 25663:1993 Water quality. Determination of Kjeldahl nitrogen. Method after mineralization with selenium
BS ISO 1871:2009 Food and feed products - General guidelines for determination of nitrogen by Kjeldahl method
BS DD CEN/TS 15476:2006 Fertilizers - Determination of nitric and ammoniacal nitrogen according to Devarda
BS ISO 24698-2:2018 Rubber, raw. Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber (NBR) - Kjeldahl method
BS ISO 24698-2:2008 Rubber, raw - Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber (NBR) - Kjeldahl method
BS EN 16169:2012 Sludge, treated biowaste and soil. Determination of Kjeldahl nitrogen

International Dairy Federation (IDF), Determination principle of Kjeldahl method

IDF 20-1-2001 Milk - Determination of nitrogen content - Part 1: Kjeldahl method
IDF 20-1-2014 Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation
IDF/RM 25-2008 Milk and milk products - Determination of nitrogen content and crude protein calculation - Kjeldahl method

AENOR, Determination principle of Kjeldahl method

UNE 77318:2001 Soil quality. Determination of total nitrogen. Modified Kjeldahl method.
UNE-EN 12135:1998 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
UNE 32013:1995 COAL. DETERMINATION OF NITROGEN. SEMI-MICRO KJELDAHL METHOD.
UNE-EN ISO 3188:1995 STARCHES AND DERIVED PRODUCTS. DETERMINATION OF NITROGEN CONTENT BY THE KJELDAHL METHOD. TITRIMETRIC METHOD. (ISO 3188:1978).
UNE-EN ISO 8968-1:2014 Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation (ISO 8968-1:2014)
UNE-EN 25663:1994 WATER QUALITY. DETERMINATION OF KJELDAHL NITROGEN. METHOD AFTER MINERALIZATION WITH SELENIUM. (ISO 5663:1984).
UNE-EN 13654-1:2002 Soil improvers and growing media - Determination of nitrogen - Part 1: Modified 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 ISO 5378:1995 STARCHES AND DERIVED PRODUCTS. DETERMINATION OF NITROGEN CONTENT BY THE KJELDHAL METHOD. SPECTROPHOTOMETRIC METHOD. (ISO 5378:1978).
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-EN ISO 8988:2007 Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method (ISO 8988:2006)

Lithuanian Standards Office , Determination principle of Kjeldahl method

LST EN 12135-2001 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method
LST EN 13342-2002 Characterization of sludges - Determination of Kjeldahl nitrogen
LST EN ISO 8968-1:2002 Milk - Determination of nitrogen content - Part 1: Kjeldahl method (ISO 8968-1:2001)
LST EN ISO 3188:2000 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method (ISO 3188:1978)
LST EN 25663-2000 Water quality - Determination of Kjeldahl nitrogen - Method after mineralization with selenium (ISO 5663:1984)
LST EN 16169-2012 Sludge, treated biowaste and soil - Determination of Kjeldahl nitrogen
LST EN ISO 5378:2000 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978)
LST EN 13654-1-2002 Soil improvers and growing media - Determination of nitrogen - Part 1: Modified Kjeldahl method
LST EN ISO 8968-1:2014 Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation (ISO 8968-1:2014)
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 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 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 ISO 8988:2007 Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method (ISO 8988:2006)

German Institute for Standardization, Determination principle of Kjeldahl method

DIN EN 12135:1997-12 Fruit and vegetable juices - Determination of nitrogen content - Kjeldahl method; German version EN 12135:1997
DIN EN ISO 8968-1:2014-06 Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation (ISO 8968-1:2014); German version EN ISO 8968-1:2014
DIN 51722-1:1990-07 Testing of solid fuels; determination of nitrogen content; semi-micro Kjeldahl method
DIN EN 13342:2001-01 Characterization of sludges - Determination of Kjeldahl nitrogen; German version EN 13342:2000
DIN EN ISO 3188:1994-10 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Titrimetric method (ISO 3188:1978); German version EN ISO 3188:1994
DIN EN 25663:1993-11 Water quality; determination of Kjeldahl nitrogen; method after mineralization with selenium (ISO 5663:1984); German version EN 25663:1993
DIN EN 16169:2012-11 Sludge, treated biowaste and soil - Determination of Kjeldahl nitrogen; German version EN 16169:2012
DIN EN ISO 5378:1994-10 Starches and derived products - Determination of nitrogen content by the Kjeldahl method - Spectrophotometric method (ISO 5378:1978); German version EN ISO 5378:1994
DIN EN ISO 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 EN 13654-1:2002-01 Soil improvers and growing media - Determination of nitrogen - Part 1: Modified Kjeldahl method; German version EN 13654-1:2001
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 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 8968-1:2014 Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation (ISO 8968-1:2014); German version EN ISO 8968-1:2014
DIN EN ISO 8988:2006-11 Plastics - Phenolic resins - Determination of hexamethylenetetramine content - Kjeldahl method, perchloric acid method and hydrochloric acid method (ISO 8988:2006); German version EN ISO 8988:2006
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

Professional Standard - Environmental Protection, Determination principle of Kjeldahl method

HJ 717-2014 Soil quality.Determination of total nitrogen.Modified Kjeldahl method
HJ/T 196-2005 Water quality - Determination of Kjeldahl-nitrogen Gas-phase molecular absorption spectrcmetry

国家市场监督管理总局、中国国家标准化管理委员会, Determination principle of Kjeldahl method

GB/T 6432-2018 Determination of crude protein in feeds—Kjeldahl method

Standard Association of Australia （SAA）, Determination principle of Kjeldahl method

AS ISO 8968.1:2021 Milk and milk products — Determination of nitrogen content, Part 1: Kjeldahl principle and crude protein calculation

未注明发布机构, Determination principle of Kjeldahl 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 5983-1:2005(2009) Animal feeding stuffs — Determination of nitrogen content and calculation of crude protein content — Part 1 : Kjeldahl method

PT-IPQ, Determination principle of Kjeldahl method

NP 1986-1991 Milks Determination of protein content. Kjeldahl technique
NP 1996-2000 Cereals and pulses Determiantion of the nitrogen content and calculation of the raw protein content Kjeldhal method

GOSTR, Determination principle of Kjeldahl method

GOST 34454-2018 Dairy products. Determination of protein content by the Kjeldahl method
GOST 34536-2019 Milk and milk products. Determination of mass fraction of whey proteins by Kjeldahl method

American Society for Testing and Materials (ASTM), Determination principle of Kjeldahl method

ASTM E147-61(2017) Standard Specification for Apparatus for Microdetermination of Nitrogen by Kjeldahl Method
ASTM D3590-11 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-02 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM D3590-17 Standard Test Methods for Total Kjeldahl Nitrogen in Water
ASTM UOP432-65T Total Nitrogen in Liquefied Petroleum Gases by Acid Extraction-Kjeldahl Procedure
ASTM E258-67(2002) Standard Test Method for Total Nitrogen in Organic Materials by Modified Kjeldahl Method
ASTM D3228-22 Standard Test Method for Total Nitrogen in Lubricating Oils and Fuel Oils by Modified Kjeldahl Method
ASTM E258-67(1996)e1 Standard Test Method for Total Nitrogen in Organic Materials by Modified Kjeldahl Method
ASTM D8001-16e1 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM D8001-16 Standard Test Method for Determination of Total Nitrogen, Total Kjeldahl Nitrogen by Calculation, and Total Phosphorus in Water, Wastewater by Ion Chromatography
ASTM UOP384-76 Nitrogen in Petroleum Distillates and Heavy Oils by Acid Extraction or Direct Kjeldahl Procedure
ASTM D3228-20 Standard Test Method for Total Nitrogen in Lubricating Oils and Fuel Oils by Modified Kjeldahl Method
ASTM D3228-19 Standard Test Method for Total Nitrogen in Lubricating Oils and Fuel Oils by Modified Kjeldahl Method
ASTM D3228-08(2019) Standard Test Method for Total Nitrogen in Lubricating Oils and Fuel Oils by Modified Kjeldahl Method
ASTM D2868-17 Standard Test Method for Nitrogen Content (Kjeldahl) and Hide Substance Content of Leather, Wet Blue and Wet White
ASTM D3228-08(2014) Standard Test Method for Total Nitrogen in Lubricating Oils and Fuel Oils by Modified Kjeldahl Method
ASTM D8083-16 Standard Test Method for Total Nitrogen, and Total Kjeldahl Nitrogen (TKN) by Calculation, in Water by High Temperature Catalytic Combustion and Chemiluminescence Detection

ES-UNE, Determination principle of Kjeldahl method

UNE-EN 13342:2001 Characterization of sludges - Determination of Kjeldahl nitrogen
UNE-EN 16169:2012 Sludge, treated biowaste and soil - Determination of Kjeldahl nitrogen (Endorsed by AENOR in October of 2012.)
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)

AT-ON, Determination principle of Kjeldahl method

ONORM L 1082-1999 Chemical analyses of soils - Determination of nitrogen according to Kjeldahl
ONORM EN 25663-1993 Water quality. Determination of Kjeldahl nitrogen. Method after mineralization with selenium (ISO 5663:1984)

European Committee for Standardization (CEN), Determination principle of Kjeldahl method

EN 13342:2000 Characterisation of sludges - Determination of Kjeldahl nitrogen
EN 25663:1993 Water quality; determination of Kjeldahl nitrogen; method after mineralization with selenium (ISO 5663:1984)
CEN EN 13654-1-2001 Soil Improvers and Growing Media - Determination of Nitrogen - Part 1: Modified Kjeldahl Method
EN ISO 8968-1:2014 Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation

RO-ASRO, Determination principle of Kjeldahl method

STAS SR ISO 3188:1995 Starches and derived products - Determination of nitrogen content by the Kjeldahl method-Titrimetric method
STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen by the Kjeldahl method. Spectrophotometric method
STAS SR 9763-13-1996 Spices and condiments. Determination of nitrogen content by the Kjeldahl method. Spectrophotometric method

BG-BDS, Determination principle of Kjeldahl method

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

Inner Mongolia Provincial Standard of the People's Republic of China, Determination principle of Kjeldahl method

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

YU-JUS, Determination principle of Kjeldahl method

JUS B.H8.320-1988 Methods of analysis of coal and coke. Determination of nitrogen ccmtent - Makro Kjeldahl nethod

IT-UNI, Determination principle of Kjeldahl method

UNI 2739-1945

NL-NEN, Determination principle of Kjeldahl method

NEN-ISO 5663:1993 Water quality. Determination of kjeldahl nitrogen. Method after mineralizaton with selenium (ISO 5663:1984)
NEN 3760-1984 Cheese - Determination of the nitrogen content according to Kjeldahl - Calculation of the crude protein content
NEN 3198-1984 Milk, evaporated milk and dried milk - Determination of the nitrogen content according to Kjeldahl - Calculation of the crude protein content (reference method)
NEN 6482-1982 Water - Determination of the sum of ammoniacal and organically bound nitrogen according to Kjeldahl after mineralization with selenium
NEN 6481-1983 Water - Determination of the sum of ammoniacal and organically bound nitrogen according to Kjeldahl after mineralization with selenium
NEN 6641-1983 Sludge - Determination of the sum of ammoniacal and organically bound nitrogen according to Kjeldahl after mineralization with selenium
NEN 6622-1988 Sludge - Determination of sand and other acidinsoluble material, and the fraction with a partiele size greater than 0,1 mm - Gravimetric 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

CEN - European Committee for Standardization, Determination principle of Kjeldahl method

EN ISO 8968-1:2001 Milk - Determination of Nitrogen Content - Part 1: Kjeldahl Method

Professional Standard - Urban Construction, Determination principle of Kjeldahl method

CJ/T 3018.7-1993 Leachate.Determination of Kjeldahl nitrogen.Method after mineralization with mercuric sulfate catalyst

TH-TISI, Determination principle of Kjeldahl method

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

GB/T 33317-2016 Plastics—Phenolic resins—Determination of hexamethylenetetramine content—Kjeldahl method,perchloric acid method and hydrochloric acid method

Professional Standard - Geology, Determination principle of Kjeldahl method

DZ/T 0279.29-2016 Methods of Analysis of Regional Geochemical Samples Part 29: Nitrogen Determination Kjeldahl Distillation - Volumetric Method

Yunnan Provincial Standard of the People's Republic of China, Determination principle of Kjeldahl method

DB53/T 624-2014 Determination of Nitrate Nitrogen and Nitrite Nitrogen in Coking Wastewater by Dairyler's Alloy Reduction-Neutralization Titration

Professional Standard - Petrochemical Industry, Determination principle of Kjeldahl method

SH/T 1157.2-2015 Rubber, raw.Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber (NBR).Part 2:Kjeldahl method
SH/T 0224-1992 Determination of Nitrogen Content in Petroleum Additives (Kirsch method)

Professional Standard - Commodity Inspection, Determination principle of Kjeldahl method

SN/T 3470.2-2013 Rubber,raw.Determination of bound acrylonitrile content in acrylonitrile-butadiene rubber(NBR).Part 2:Kjeldahl method

TR-TSE, Determination principle of Kjeldahl method

TS 362-1966 DETERMINAT?ON OF NITROGEN ?N COAL BY THE SEMI ■ M?KRO KJELDAHL METHOD

Professional Standard - Agriculture, Determination principle of Kjeldahl method

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 3-1982 Method for determination of crude protein in cereals and beans seeds(Semi-micro kjeldahl method)
GB 2905-1982 Determination of crude protein in cereal and bean crop seeds (semi-micro Kjeldahl method)

Hunan Provincial Standard of the People's Republic of China, Determination principle of Kjeldahl method

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

CU-NC, Determination principle of Kjeldahl method

NC 26-124-1985 Drugs, Deterrnination of Nitrogen by Kjejdah!. Testing Method