Methods for detecting trace amounts of protein

Methods for detecting trace amounts of protein, Total:277 items.

The international standard classification for "Methods for detecting trace amounts of protein" includes: General methods of tests and analysis for food products , Biology. Botany. Zoology , Fruits. Vegetables , food products in general , Meat and meat products , Cereals, pulses and derived products , Animal feeding stuffs , Edible oils and fats. Oilseeds , Chemical reagents , Textiles in general , Man-made fibres , Laboratory medicine .

The Chinese standard classification for "Methods for detecting trace amounts of protein" includes: Basic standards and general methods , Environmental Condition and General Test Method , Other cash crops , Biochemical reagent and clinical analysis reagent , Food sanitation , Basic standards and general methods , Meat processing and products , Cereal crop and product , Food processing and products in general , Cereal crop and forage crop in general , Basic standard and general method on forestry , Livestock and poultry feed and additive , Oil crop and product , Melon, fruit and vegetable planting and product , Silk and silk fabric in general , Chemical fibre in general , Medical laboratory equipment .

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

GB/T 14771-1993 Method for determination of protein content in foods
GB/T 8856-1988 Method for determination of crude protein in fruit and vegetable products
GB/T 33410-2016 Determination of the activity of protease K in biochemical reagents
GB/T 35534-2017 Examination methods of pancreatic digest of casein
GB/T 17811-2008 Determination of pepsin digestibility in animal protein feeds - Filtration method
GB/T 17811-1999 Determination of digestibility in animal protein feeds--Pepsin method
GB/T 14489.2-2008 Inspection of grain and oils—Determination of crude protein in oilseeds
GB/T 24897-2010 Inspection of grain and oils—Crude protein determination in rice—Near-infrared method
GB/T 5511-1985 Inspection of grain and oilseeds--Methods for determination of crude protein
GB/T 44214-2024 Test method for non-protein content in silk
GB/T 24870-2010 Inspection of grain and oils—Crude protein and crude fat determination in soybean—Near-infrared method
GB/T 24871-2010 Inspection of grain and oils—Crude protein determination in wheat flour—Near-infrared method
GB/T 15673-1995 Method for determination of crude protein in edible fungi
GB/T 24899-2010 Inspection of grain and oils—Determination of crude protein in wheat—Near-infrared method
GB/T 24901-2010 Inspection of grain and oils—Determination of crude protein in maize—Near-infrared method
GB/T 46117-2025 Inspection of grain and oils—Determination of water-soluble protein in soya bean
GB 8856-1988 Method for Determination of Crude Protein in Fruit and Vegetable Products
GB/T 35809-2018 Method for analysis of forestry biomass—Determination of protein content
GB/T 41366-2022 Livestock and poultry meat quality testing—Determination of moisture,protein and fat—Near-infrared spectroscopy method
GB 2905-1982 Method for determination of crude protein in cereals and beans seeds (Semi-micro kjeldahls method)
GB/T 17811-2025 Determination of pepsin digestibility for animal-derived protein feeds—Filtration method
GB/T 14489.2-1993 Method for determination of crude protein in oilseed
GB/T 19495.8-2004 Detection of genetically modified plants and derived products-Protein based methods
GB/T 34800-2017 Detection method of activity and impurity of proteinase K
GB/T 5009.5-1985 Method for determination of protein in foods

Professional Standard - Textile

FZ/T 50018-2013 Determination of the protein content of the protein viscose fiber

Taiwan Provincial Standard of the People's Republic of China

CNS 5035-1986 Method of Test for Crude Protein in Food
CNS 3449-1988 Methods of Test for Milk and Milk Products: The Quantitive Analysis of Protein
CNS 6511-2008 Method of test for meat and meat products - Determination of crude protein content
CNS 2770.5-1986 Method of Test for Feeds : Determination of Crude Protein
CNS 2770-5-1986 Method of Test for Feeds : Determination of Crude Protein
CNS 3449-2007 Method of test for milk and milk products - Determination of protein

Tianjin Provincial Standard of the People's Republic of China

DB12/T 347-2007 Near-infrared rapid detection method of crude protein content in wheat and corn

Professional Standard - Medicine

YY/T 1456-2016 Human ferritin quantitative test reagent
YY/T 1969-2025 Microalbumin Determination Reagent Kit (Immunoturbidimetry Method)
YY/T 1442-2016 β2—Microglobulin quantitative detection reagents(kit)

Professional Standard - Agriculture

220药典三部-2020 Content Determination Method 0731 Protein Content Determination Method
176药典三部-2010 Appendix Ⅵ ⅥB protein assay
92药典四部-2020 0700 Other Determination Methods 0731 Determination of Protein Content
201药典三部-2015 Content Determination Method 0731 General Principles of Protein Content Determination Method 50
111药典四部-2015 0700 Other Determination Methods 0731 Determination of Protein Content
2330药典二部-2010 Appendix VII M Determination of protein content
农业部2630号公告-12-2017 Evaluation method of foreign protein detection test paper for detection of components of transgenic plants and their products
NY/T 3-1982 Method for determination of crude protein in cereals and beans seeds(Semi - Micro kjeldahl method)

Professional Standard - Commodity Inspection

SN/T 3926-2014 Determination of protein content in dairy foods,egg foods and soy foods for export - Coomassie brilliant blue method
SN/T 0800.3-1999 Cereals and feedstuffs for import and export - Method for the determination of crude protein
SN/T 2206.7-2010 Determination of microbiological in cosmetics—Part 7:Determination of bovine spongiform encephalopathy(BSE) by western blot method
SN/T 0803.9-1999 Oil bearing materials for import and export—Method for the determination of crude protein

Group Standards of the People's Republic of China

T/CVMA 129-2023 Competitive magnetic particle based chemiluminescence immunoassay for detecting antibodies against 3ABC non-structural protein of foot and mouth disease virus
T/SHNX 001-2025 Determination of lactoferrin, α-lactalbumin and β-lactoglobulin in raw bovine milk by liquid chromatography-tandem mass spectrometry
T/CSTM 00956-2024 Globular protein-Determination of apparent molecular weight-Solution nuclear magnetic resonance spectrometry
T/CVMA 173-2024 Magnetic particle chemiluminescent immunoassay detection of gB antibodies against pseudorabies virus
T/QGCML 2180-2023 Western Blot detection technical specifications

Professional Standard - Machinery

JB/T 12964-2016 Fast analyzer for the protein in milk and powder milk

Czech Standards Institute (UNMZ)

CSN 57 0111-5-2002 Testing methods for casein and caseinates - Determination of protein content
CSN 570111-5-2002 Testing methods for casein and caseinates - Determination of protein content
CSN 46 7092-27-1998 Testing methods for feeding stuffs - Part 27: Determination of the protein content
CSN 57 0105 Cast.5-1984 Powdered and condensed milk products. Testing methods. Determination of protein content
CSN 57 0153-1986 Testing methods for meat products and sterilized food in preserves. Determination of protein content according to Kjeldahl
CSN 57 0111 Cast.4-1979 Testing methods for asein. Determination f fat content
CSN 57 0111-3-2002 Testing methods for casein and caseinates - Determination of moisture
CSN 57 0111-12-2002 Testing methods for casein and caseinates - Determination of pH
CSN 57 0111-7-2002 Testing methods for casein and caseinates - Determination of ash
CSN 56 0186 Cast.12-1981 Testing methods for beer. art 12. etermination of proteins
CSN 57 0111-1-2002 Testing methods for casein and caseinates - General regulations
CSN 57 0111-2-2002 Testing methods for casein and caseinates - Methods of samphng of Chemical analysis

German Institute for Standardization

DIN 10454:1983-03 Determination of protein content of caseins and caseinates; reference method
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 ISO 8968-4 E:2013-09 Determination of nitrogen content of milk and milk products Part 4: Determination of protein and non-protein nitrogen content and calculation of pure protein content (Reference Method) (Draft)
DIN EN ISO 21572 Berichtigung 1:2005 Food – Methods for the detection of genetically modified organisms and their products – Protein methods
DIN EN ISO 21572:2004 Food – Methods for the detection of genetically modified organisms and their products – Protein methods
DIN 10466:2001 Determination of whey protein content in total protein of milk and milk products - Polarographic method
DIN EN ISO 8968-4 E:2013 Draft Document - 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/DIS 8968-4:2013); German version prEN ISO 8968-...
DIN 10470:2011 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
DIN 10464:1994 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus method
DIN 10464:1994-08 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus method
DIN 10470:1999 Determination of whey protein content and casein content in total protein of milk and milk products - Derivative spectroscopic method
DIN ISO 5550 E:2020-06 Caseins and caseinates - Determination of moisture content (Reference method)
DIN 10453:1983-03 Determination of water content of caseins and caseinates; reference method
DIN ISO 5550:2020-12 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN 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); German version EN ISO 8968-4:2016
DIN ISO 5550:2020 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN EN ISO 21572:2020-02 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019); German version EN ISO 21572:2019
DIN 10456:1989-04 Determination of pH of caseins and caseinates; reference method
DIN 10470:2011-07 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
DIN 10472:1996 Determination of casein and whey protein contents of milk and milk products - Electrophoretic method
DIN ISO 5546 E:2020-08 Caseins and caseinates - Determination of pH (Reference method)
DIN EN ISO 21572:2020 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019)
DIN ISO 5550:2020-06 Draft Document - Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006); Text in German and English

Austrian Standards

ONORM DIN 10454-1993 Determination of protein content of caseins and caseinates - Reference method
ONORM DIN 10453-1993 Determination of water content of caseins and caseinates - Reference method
ONORM DIN 10456-1993 Determination of pH of caseins and caseinates - Reference method

Japanese Industrial Standards Committee (JISC)

JIS K 0602:2000 Proteins -- Serum albumin -- Methods for quantitative analysis
JIS K 0605:2000 Proteins -- Trypsin -- Methods for quantitative analysis
JIS K 0606:2000 Proteins -- Transferrin -- Methods for quantitative analysis
JIS K 0603:2000 Proteins -- Immunoglobulin -- Methods for quantitative analysis
JIS K 0604:2000 Proteins -- Monoclonal IgG -- Methods for quantitative analysis
JIS K 0602:1992 Methods for quantitative analysis of serum albumin
JIS K 0607:2000 Proteins -- Glucoseoxydase -- Methods for quantitative analysis
JIS K 0605:1992 Methods for quantitative analysis of trypsin

Korean Agency for Technology and Standards (KATS)

KS H 1204-2021 Testing method for crude proteins content
KS H 1204-2012 Testing method for crude proteins content
KS H 1204-2001 Testing method for crude proteins content
KS H 1204-2022 Testing method for crude proteins content
KS H ISO 5549:2021 Caseins and caseinates — Determination of protein content(Reference method)
KS H ISO 5549:2006 Caseins and caseinates－Determination of protein content(Reference method)
KS H ISO 5549-2021 Caseins and caseinates — Determination of protein content(Reference method)
KS H ISO 5549-2006(2016) Caseins and caseinates－Determination of protein content(Reference method)
KS J 4201-2008 Methods for quantitative analysis of serum albumin
KS J ISO 21572-2019 Foodstuffs－Methods for the detection of genetically modified organisms and derived products－Protein based methods
KS J ISO 21572-2009(2019) Foodstuffs－Methods for the detection of genetically modified organisms and derived products－Protein based methods
KS J ISO 21572-2024 Foodstuffs－Methods for the detection of genetically modified organisms and derived products－Protein based methods
KS J 4201-2023 Methods for quantitative analysis of serum albumin
KS H ISO 5543-2006(2016) Caseins and caseinates－Determination of fat content－Gravimetric method(Reference method)
KS J ISO 21572:2009 Foodstuffs-Methods for the detection of genetically modified organisms and derived products-Protein based methods
KS P 1015-2012 Establishment of a reference material and evaluation method for troponin-based cardiovascular diagnostics
KS H ISO 5739:2006 Caseins and caseinates－Determination of scorched particles content
KS H ISO 5550:2007 Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5543:2021 Caseins and caseinates — Determination of fat content — Gravimetric method(Reference method)
KS H ISO 5550-2007(2012) Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5546:2006 Caseins and caseinates－Determination of pH(Reference method)
KS H ISO 5543:2006 Caseins and caseinates－Determination of fat content－Gravimetric method(Reference method)
KS H ISO 5548:2020 Caseins and caseinates－Determination of lactose content－Photometric method
KS H ISO 5543-2021 Caseins and caseinates — Determination of fat content — Gravimetric method(Reference method)
KS H ISO 5548:2006 Caseins and caseinates－Determination of lactose content－Photometric method
KS H ISO 5550-2021 Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5548-2020 Caseins and caseinates－Determination of lactose content－Photometric method

Standard Association of Australia （SAA）

AS 1871.9:1976 List of methods for examination of waters Nitrogen (albuminoid)
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)
AS 1095.2.6:1978 Microbiological methods for the dairy industry, Part 2.6: Methods for the examination of specific dairy products - Caseins, caseinates, and coprecipitates
AS 1095.3.6:1975 Microbiological methods for the dairy industry, Part 3.6: Methods of examination for specific groups of microorganisms - Proteolytic organisms

International Organization for Standardization (ISO)

ISO 5549:1978 Caseins and caseinates; Determination of protein content (Reference 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 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 5739:1983 Caseins and caseinates; Determination of scorched particles content
ISO 20483:2006 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method
ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
ISO 21572:2004 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods
ISO 21572:2013 Foodstuffs - Molecular biomarker analysis - Protein-based methods
ISO 5550:2006|IDF 78:2006 Caseins and caseinates — Determination of moisture content (Reference method)
ISO 5550:2006 Caseins and caseinates - Determination of moisture content (Reference method)
ISO 5543:2004 | IDF 127:2004 Caseins and caseinates — Determination of fat content — Gravimetric method (Reference method)
ISO 5739:2003|IDF 107:2003 Determination of casein and caseinate coke particles and foreign matter content
ISO 5546:2010 | IDF 115:2010 Caseins and caseinates — Determination of pH (Reference method)
ISO 5546:2010|IDF 115:2010 Determination of pH value of casein and caseinate (standard method)
ISO 5548:1980 Caseins and caseinates; Determination of lactose content; Photometric method
ISO 5548:2004 | IDF 106:2004 Caseins and caseinates — Determination of lactose content — Photometric method
ISO 5548:2004|IDF 106:2004 Caseins and caseinates — Determination of lactose content — Photometric method
ISO 5548:2004 Caseins and caseinates - Determination of lactose content - Photometric method
ISO 5550:1978 Caseins and caseinates; Determination of water content (Reference method)
ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
ISO 5550:2006 | IDF 78:2006 Caseins and caseinates — Determination of moisture content (Reference method)
ISO 5542:1984 Milk; Determination of protein content; Amido black dye-binding method (Routine method)
ISO 5543:2004 Caseins and caseinates - Determination of fat content - Gravimetric method (Reference method)
ISO 5543:2004|IDF 127:2004 Gravimetric method for determination of fat content in casein and caseinate (reference method)

Indonesia Standards

SNI 14-1038-1989 Kertas dan karton, Cara uji kualitatip kasein dan protein kedelai
SNI 14-1037-1989 Kertas dan karton, Cara uji lapisan salut berperekat protein

Portuguese Institute of Quality

NP 1986-1991 Milks Determination of protein content. Kjeldahl technique

Bureau of Indian Standards

IS 18836-2024 Milk and Milk Products - Determination of Nitrogen Content - Determination of Protein and Non-Protein Nitrogen Content and True Protein Content Calculation (Reference Method)
IS 7481-1974 How to measure protein efficiency ratio (PER)
IS 11920-2012 Cassein and Caseinates -Determination of Moisture Content (Reference Method)
IS 11888-2005 Casiens And Caseinated - Determination Of Contents Of Scorched Particles And Of Extraneous Matter
IS 11963-1987 Photometric method for determination of lactose content in casein and caseinate
IS 11888-1987 Method for determination of charred particle content in casein and caseinates
IS/ISO 21572-2019 Foodstuffs-Molecular Biomarker Analysis- Immunochemical Methods for the Detection and Quantification of Proteins
IS 7219-1973 Methods for determination of protein in food and feed
IS 2006-1988 Methods for the quantitative chemical analysis of binary mixtures of protein fibers and certain other non-protein fibers
IS 11963-2005 Caeins and Caseinates - Determination of Lactose Content - Photometric Method

British Standards Institution (BSI)

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 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 6248-10:1986 Caseins and caseinates-Method for determination of fat (gravimetric reference method)
BS 4285 Sec.3.5:1988 Microbiological examination for dairy purposes. Methods for detection and/or enumeration of specific groups of microorganisms. Enumeration of proteolytic microorganisms
BS EN ISO 21572:2004 Foodstuffs. Methods for the detection of genetically modified organisms and derived products. Protein based methods
BS ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
BS EN ISO 21572:2019 Foodstuffs. Molecular biomarker analysis. Immunochemical methods for the detection and quantification of proteins
BS 6248-11:1987 Caseins and caseinates. Method for determination of nitrate and nitrite contents
BS 4285-3.5:1988 Microbiological examination for dairy purposes - Methods for detection and/or enumeration of specific groups of microorganisms - Enumeration of proteolytic microorganisms
BS ISO 5548:2004 Caseins and caseinates - Determination of lactose content - Photometric methods
BS ISO 5550:2006 Caseins and caseinates - Determination of moisture content (Reference method)
BS 6248-9:1984 Caseins and caseinates-Method for the determination of scorched particles
BS EN ISO 21415-4:2007 Wheat and wheat flour - Gluten content - Determination of dry gluten from wet gluten by a rapid drying method
BS ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
BS ISO 5543:2004 Caseins and caseinates - Determination of fat content - Gravimetric method (reference method)
BS ISO 17997-2:2005 Milk - Determination of casein-nitrogen content - Direct method
BS EN ISO 8968-5:2002 Milk. Determination of nitrogen content. Determination of protein-nitrogen content

Gosstandart of Russia

GOST R 51470-1999 Caseins and caseinates. Method for determination of protein content
GOST 34551-2019 Сonfectionery. Method for determination of mass fraction of protein
GOST 25179-1990 Milk. Methods for determination of protein
GOST ISO 8968-4-2021 Milk and dairy products. Determination of nitrogen content. Part 4. Determination of protein and non-protein nitrogen content and calculation of true protein content (reference method)..
GOST 10846-1991 Grain and products of its processing. Method for determination of protein
GOST R 51464-1999 Caseins and caseinates. Method for determination of water content
GOST R 51466-1999 Caseins. Method for determination of "fixed ash" mass fraction
GOST R 51454-1999 Caseins and caseinates. Method of determination of nitrate and nitrite contents
GOST R 54478-2011 Grain. Methods of determination quantity and quality of gluten in wheat
GOST 25179-2014 Milk and milk products. Method for determination of protein
GOST ISO 5548-2016 Caseins and caseinates. Photometric method for determining the mass fraction of lactose
GOST ISO 5550-2017 Caseins and caseinates. Determination of moisture content (Reference method)
GOST R 51463-1999 Rennet caseins and caseinates. Method for determination of ASH content
GOST R 51469-1999 Caseins and caseinates. Photometric method for determination of lactose content
GOST R 51467-1999 Caseins and caseinates. Method for determination of pH
GOST 23327-1978 Milk. Methods for determination of the total protein content
GOST 23327-1998 Milk and milk products. Determination of mass part of total nitrogen by Kjeldahl method and determination of mass part of protein
GOST 25011-1981 Meat and meat products. Methods of protein determination
GOST 25011-2017 Meat and meat products. Protein determination methods
GOST 13496.4-1993 Fodder, mixed fodder and animal feed raw stuff. Methods of nitrogen and crude protein determination
GOST 13496.4-2019 Fodder, мixed fodder and raw mixed fodder. Methods of nitrogen and crude protein determination
GOST 13496.4-1984 Fodder, mixed fodder and animal feed raw stuff. Methods of nitrogen and crude protein determination
GOST R 52993-2008 Caseins and caseinates. Determination of moisture content (Reference method)
GOST 13979.3-1968 Oilcakes oil-meals. Methods of determination of soluble proteins
GOST ISO 21572-2021 Food products. Analysis using molecular biomarkers. Immunochemical methods for detection and quantification of proteins..
GOST 31978-2012 Caseins and caseinates. Method for determination of pH
GOST R 54756-2011 Milk and milk products. Мethod for determination of mass portion of whey protein with Kjeldahl method

Ente Nazionale Italiano di Unificazione

UNI 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)
UNI ISO 5543:2018 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
UNI 22632:2002 Oilseeds - Vegetable proteins content - Determination of total proteins (biuret method)
UNI EN ISO 21572:2006 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods
UNI EN ISO 21572:2019 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins

Danish Standards Foundation

DANSK DS/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)

Spanish Association for Standardization (UNE)

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)
AENOR UNE-EN ISO 8968-4:2016 Milk and dairy products. Determination of nitrogen content. Part 4: Determination of protein and non-protein nitrogen content and calculation of true protein content (Reference method). (ISO 8968-4:2016)
AENOR UNE 34400-7:1967 Test methods for wheat flour. Determination of protein.
UNE 34400-7:1967 TEST METHODS OF WHEAT FLOUR. PROTEIN DETERMINATION
UNE 64 011 Determination of the quality of Kjeldahl semi-trace crude protein in compound feed and its initial materials
UNE-EN ISO 21572:2020 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019)
UNE 34080:1974 ANALYSIS METHODS FOR CHOCOLATES. DETERMINATION OF TOTAL NITROGEN. (PROTEINS).
UNE 34835:1985 MILK. DETERMINATION OF PROTEIN CONTENT. AMIDO BLACK DYE-BINDING METHOD. ROUTINE METHOD.
UNE-EN ISO 21572:2004 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods (ISO 21572:2004)

Association Francaise de Normalisation

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 V04-387:1985 Caseins and caseinates. Determination of protein content (reference method).
NF V04-389:1985 Caseins and caseinates. Determination of scorched particles content.
NF EN ISO 8968-4:2016 Milk and dairy products - Determination of nitrogen content - Part 4: determination of protein and non-protein nitrogen content and calculation of true protein content (Reference method)
NF ISO 5550:2007 Caseins and caseinates - Determination of moisture content (reference method)
NF EN ISO 21572:2019 Food products - Molecular biomarker analysis - Immunochemical methods for protein detection and quantification
NF V04-382:1988 Caseins and caseinates. Determination of fat content. Gravimetric method (reference method).
NF V04-382:2008 Caseins and caseinates - Determination of fat content - Gravimetric method (Reference method).
NF V04-388*NF ISO 5548:2008 Caseins and caseinates - Determination of lactose content - Photometric method.
NF ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
NF EN ISO 20418-3:2020 Textiles - Qualitative and quantitative proteomic analysis of certain animal fibers - Part 3: detection of peptides by LC-MS without protein reduction
NF EN ISO 20418-1:2018 Textiles - Qualitative and quantitative proteomic analysis of certain animal fibers - Part 1: detection of peptides by LC ESI MS with protein reduction
NF ISO 5548:2008 Caseins and caseinates - Determination of lactose content - Photometric method

Lithuanian Standards Office

LST ISO 5549:2001 Caseins and caseinates. Determination of protein content (Reference method) (identical ISO 5549:1978)
LST ISO 5543:2004 Caseins and caseinates. Determination of fat content. Gravimetric method (Reference method) (idt ISO 5543:2004)
LST EN ISO 21572:2004/AC:2005 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods (ISO 21572:2004)
LST EN ISO 21572:2004 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods (ISO 21572:2004)

National Standardisation Body (ASRO)

STAS 2213/17-1976 SWEETS Determination of total proteinic content and milk proteinic substance content
STAS 21/6-1973 OILSEED RESIDUES Determination of protein of protein brut content
SR ISO 5549:1996 Caseins and caseinates - Determination of protein content (Reference method)

GCC Standardization Organization

GSO 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)
GSO 2505:2016 Method of tests for soya protein products
GSO ISO 5543:2015 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
GSO ISO 21572:2021 Foodstuffs — Molecular biomarker analysis — Immunochemical methods for the detection and quantification of proteins
GSO ISO 5550:2015 Caseins and caseinates -- Determination of moisture content (Reference method)
GSO ISO 5548:2015 Caseins and caseinates -- Determination of lactose content -- Photometric method

Standards Norway

NS-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)

Kingdom of Bahrain Testing and Metrology Directorate

BH GSO ISO 8968-4:2022 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)
BH GSO ISO 5543:2016 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
BH GSO ISO 21572:2022 Foodstuffs — Molecular biomarker analysis — Immunochemical methods for the detection and quantification of proteins

Clinical and Laboratory Standards Institute

CLSI C64-2021 Quantitative Measurement of Proteins and Peptides by Mass Spectrometry

European Committee for Standardization (CEN)

EN ISO 8968-4:2001 Milk - Determination of Nitrogen Content - Part 4: Determination of Non-Protein Nitrogen Content
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)

Magyar Szabványügyi Testület

MNOSZ 448-28.lap-1955 Water testing - amino acid protein testing
MSZ 20500/4-1987 Detection method of dry noodles, egg content detection
MNOSZ 9603-1952 Casein sample collection and general testing methods

COMMISSION FOR THE STANDARDS, METROLOGY AND QUALITY OF VIETNAM (STAMEQ)

TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content
TCVN 7607-2007 Foodstuffs.Methods of analysis for the detection of genetically modified organisms and derived products.Protein based methods

Swedish Institute for Standards

SS-EN ISO 8968-4:2017 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) (ISO 8968-4:2016)
SS-EN ISO 21572:2019 Foodstuffs - Molecular biomarker analysis - Immunochemical methods for the detection and quantification of proteins (ISO 21572:2019)

International Dairy Federation (IDF)

IDF 78-2006 Caseins and caseinates. Determination of moisture content (Reference method)

American Society for Testing and Materials (ASTM)

ASTM F831-83 Net Protein Ratio (NPR) Test Method
ASTM D7818-12 Standard Test Method for Enumeration of Proteolytic Bacteria in Fresh (Uncured) Hides and Skins

South African Bureau of Standard

SANS 21572:2005 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods
SANS 6039:2005 Amylaceous and proteinaceous matter detection in wood adhesives

The Directorate General of Specifications and Metrology (DGSM)

OS GSO ISO 5543:2015 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
OS GSO 2505:2016 Method of tests for soya protein products
OS GSO ISO 5548:2015 Caseins and caseinates -- Determination of lactose content -- Photometric method
OS GSO ISO 5550:2015 Caseins and caseinates -- Determination of moisture content (Reference method)

Polski Komitet Normalizacyjny (PKN)

PN C04288-14-1987 Technical fats Methods of testing Determination of protein content