How can proteins be identified?

How can proteins be identified?, Total:258 items.

The international standard classification for "How can proteins be identified?" includes: food products in general , Animal feeding stuffs , Edible oils and fats. Oilseeds , Fruits. Vegetables , Biology. Botany. Zoology , Milk and processed milk products , General methods of tests and analysis for food products , Man-made fibres , Protection against crime , Medical Sciences and health care facilities in general .

The Chinese standard classification for "How can proteins be identified?" includes: Food sanitation , Basic standards and general methods , Livestock and poultry feed and additive , Oil crop and product , Other cash crops , Melon, fruit and vegetable planting and product , Basic standard and general method on forestry , Cereal crop and forage crop in general , Food processing and products in general , Environmental Condition and General Test Method , Children foods , Basic standards and general methods , Chemical fibre in general , Grain processing and products , Crime judging technology , Sanitation in general .

Jilin Provincial Standard of the People's Republic of China

DB22/T 294-2020 Method for identification of adulteration of crude protein in corn gluten meal
DB22/T 3646-2024 Identification of Changbai Mountain forest frog oil High-performance liquid chromatography protein characteristic mapping method

Taiwan Provincial Standard of the People's Republic of China

CNS 2713-1978 Method for Determining of Digest Protein of Feather Meal
CNS 3449-2007 Method of test for milk and milk products - Determination of protein
CNS 3449-1988 Methods of Test for Milk and Milk Products: The Quantitive Analysis of Protein
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

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

GB/T 17811-2008 Determination of pepsin digestibility in animal protein feeds - Filtration method
GB/T 14771-1993 Method for determination of protein content in foods
GB/T 19495.8-2004 Detection of genetically modified plants and derived products-Protein based methods
GB/T 5511-1985 Inspection of grain and oilseeds--Methods for determination of crude protein
GB/T 34800-2017 Detection method of activity and impurity of proteinase K
GB 8856-1988 Method for Determination of Crude Protein in Fruit and Vegetable Products
GB/T 5413.1-1997 Milk powder and formula foods for infant and young children-Determination of protein
GB/T 5009.5-2003 Determination of protein in foods
GB/T 17811-2025 Determination of pepsin digestibility for animal-derived protein feeds—Filtration method
GB/T 8856-1988 Method for determination of crude protein in fruit and vegetable products
GB/T 15673-1995 Method for determination of crude protein in edible fungi
GB/T 14489.2-1993 Method for determination of crude protein in oilseed
GB/T 17811-1999 Determination of digestibility in animal protein feeds--Pepsin method
GB/T 5009.5-1985 Method for determination of protein in foods
BJS 201707 Identification of plant-derived ingredients in plant protein beverages
GB/T 35809-2018 Method for analysis of forestry biomass—Determination of protein content
GB/T 6432-1994 Method for the determination of crude protein in feedstuffs

Group Standards of the People's Republic of China

T/CAB 0062-2020 Identification of type Ⅲ collagen LC-MS/MS method
T/SHNX 001-2025 Determination of lactoferrin, α-lactalbumin and β-lactoglobulin in raw bovine milk by liquid chromatography-tandem mass spectrometry
T/TDSTIA 026-2022 Determination of α-lactalbumin and β-lactoglobulin in infant formula milk powder—Gel permeation chromatography
T/ZGKSL 009-2023 Test method for determination of collagen secreted from human cells induced by recombinant collagen

Professional Standard - Agriculture

111药典四部-2015 0700 Other Determination Methods 0731 Determination of Protein Content
NY/T 449-2001 Identification purity of maize variety using salting in protein eletrohporesis
92药典四部-2020 0700 Other Determination Methods 0731 Determination of Protein Content
2330药典二部-2010 Appendix VII M Determination of protein content
176药典三部-2010 Appendix Ⅵ ⅥB protein assay
220药典三部-2020 Content Determination Method 0731 Protein Content Determination Method

Professional Standard - Textile

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

Professional Standard - Commodity Inspection

SN/T 0803.9-1999 Oil bearing materials for import and export—Method for the determination of crude protein
SN/T 1048-2002 Cereals and feedstuffs for import and export - Identification for barley variety - Method of protein electrophoresis

Hebei Provincial Standard of the People's Republic of China

DB13/T 1098-2009 Determination of protein in feed

Shandong Provincial Standard of the People's Republic of China

DB37/T 4415-2021 Detection of β-lactoglobulin gene knockout cow and β-lactoglobulin in cow's milk

Professional Standard - Public Safety Standards

GA/T 819-2009 Analytical method of acid dyes on the protein fibers

Professional Standard - Chemical Industry

HG/T 3645-1999 Method for the determination of aqueous extractable protein in natural rubber gloves using the Lowry method

Professional Standard - Hygiene

WS/T 341-2011 Reference method for haemoglobinometry in human blood
WS 341-2011 Reference method for hemoglobin determination

National Health Commission of the People's Republic of China

WST 341:2011 Hemoglobin measurement reference method

Shanxi Provincial Standard of the People's Republic of China

DB14/T 2943-2023 How to identify white-striped toilet flies

Heilongjiang Provincial Standard of the People's Republic of China

DB23/T 1686-2016 Determination method of metallothionein in plants

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
JIS K 0606:1993 Methods for quantitative analysis of transferrin
JIS K 0603:1992 Methods for quantitative analysis of immuno globulin

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 10456:1989-04 Determination of pH of caseins and caseinates; reference method
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 ISO 5546 E:2020-08 Caseins and caseinates - Determination of pH (Reference method)
DIN 10466:2001 Determination of whey protein content in total protein of milk and milk products - Polarographic method
DIN 10470:2011 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic 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 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 10452:1983-03 Determination of ash of rennet caseins and caseinates; reference method
DIN ISO 5550:2020-12 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN ISO 5546:2020-12 Caseins and caseinates - Determination of pH (Reference method) (ISO 5546:2010)
DIN 10464:1994 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 10464:1994-08 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus method
DIN ISO 5545 E:2020-06 Rennet caseins and caseinates - Determination of ash (Reference method)
DIN ISO 5546:2020 Caseins and caseinates - Determination of pH (Reference method) (ISO 5546:2010)
DIN ISO 5545:2020-12 Rennet caseins and caseinates - Determination of ash (Reference method) (ISO 5545:2008)
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 5544:2020-12 Caseins - Determination of "fixed ash" (Reference method) (ISO 5544:2008)
DIN ISO 5550:2020 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN ISO 5544 E:2020-06 Caseins - Determination of "fixed ash" (Reference method)
DIN 10451:1983-03 Determination of "fixed ash" of caseins; reference method
DIN ISO 5545:2020 Rennet caseins and caseinates - Determination of ash (Reference method) (ISO 5545:2008)
DIN ISO 5546:2020-08 Draft Document - Caseins and caseinates - Determination of pH (Reference method) (ISO 5546:2010); Text in German and English

Austrian Standards

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

Indonesia Standards

SNI 08-0987-1989 Cara identifikasi zat warna pada serat protein
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

Gosstandart of Russia

GOST 25179-1990 Milk. Methods for determination of protein
GOST R 53213-2008 Meat and meat products. Histological method of identification of plant protein additives
GOST R 51470-1999 Caseins and caseinates. Method for determination of protein content
GOST 25179-2014 Milk and milk products. Method for determination of protein
GOST 34551-2019 Сonfectionery. Method for determination of mass fraction of protein
GOST R 51467-1999 Caseins and caseinates. Method for determination of pH
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 25011-1981 Meat and meat products. Methods of protein determination
GOST 25011-2017 Meat and meat products. Protein determination methods
GOST R 51464-1999 Caseins and caseinates. Method for determination of water content
GOST 13979.3-1968 Oilcakes oil-meals. Methods of determination of soluble proteins
GOST R 51466-1999 Caseins. Method for determination of "fixed ash" mass fraction
GOST 32148-2013 Foodstuffs of processed poultry eggs. Method for identification of poultry egg species
GOST 31978-2012 Caseins and caseinates. Method for determination of pH
GOST R 70145-2022 Meat and meat products. Histological method of identification of animal protein connective tissue
GOST 10846-1991 Grain and products of its processing. Method for determination of protein
GOST R 51454-1999 Caseins and caseinates. Method of determination of nitrate and nitrite contents
GOST ISO 5548-2016 Caseins and caseinates. Photometric method for determining the mass fraction of lactose
GOST R 54478-2011 Grain. Methods of determination quantity and quality of gluten in wheat
GOST 28074-1989 Vegetable fodder. Method for the determination of crude protein solubility
GOST 28075-1989 Vegetable fodder. Method for the determination of crude protein splitting
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 51468-1999 Caseins. Method for determination of free acidity
GOST R 54756-2011 Milk and milk products. Мethod for determination of mass portion of whey protein with Kjeldahl method
GOST 20264.2-1988 Enzyme preparations. Methods for determination of proteolytic activity
GOST R 53761-2009 Milk. The identification of protein composition by use the electrophoresis in polyakrilamide gel
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 13496.4-2019 Fodder, мixed fodder and raw mixed fodder. Methods of nitrogen and crude protein determination
GOST 13496.4-1993 Fodder, mixed fodder and animal feed raw stuff. Methods of nitrogen and crude protein determination

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 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 0111-8-2002 Testing methods for casein and caseinates - Determination of titratable acidity
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 0111-2-2002 Testing methods for casein and caseinates - Methods of samphng of Chemical analysis
CSN 57 0111-1-2002 Testing methods for casein and caseinates - General regulations
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.6-1985 Testing methods for casein. Determination of lactose
CSN 57 0111 Cast.10-1979 Testing methods for casein. Determination of purity
CSN 57 0111 Cast.11-1979 Testing methods for casein. Determination of colour

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 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
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 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 5546:1979 Caseins and caseinates; Determination of pH (Reference method)
ISO 5739:2003|IDF 107:2003 Determination of casein and caseinate coke particles and foreign matter content
ISO 5550:2006 Caseins and caseinates - Determination of moisture content (Reference method)
ISO 5550:2006|IDF 78:2006 Caseins and caseinates — Determination of moisture content (Reference method)

Korean Agency for Technology and Standards (KATS)

KS H ISO 5549:2021 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 Caseins and caseinates－Determination of protein content(Reference method)
KS H 1204-2012 Testing method for crude proteins content
KS H ISO 5549-2006(2016) Caseins and caseinates－Determination of protein content(Reference method)
KS H 1204-2001 Testing method for crude proteins content
KS H 1204-2022 Testing method for crude proteins content
KS H 1204-2021 Testing method for crude proteins content
KS J 4201-2008 Methods for quantitative analysis of serum albumin
KS H ISO 5546:2006 Caseins and caseinates－Determination of pH(Reference method)
KS J 4201-2023 Methods for quantitative analysis of serum albumin
KS J 4201-2018 Methods for quantitative analysis of serum albumin
KS J 0023-2025 Biotechnology — Quantitative analysis method for proteins produced by biotechnology
KS J 4202-2008 Methods for quantitative analysis of immunoglobulin
KS H ISO 5739:2006 Caseins and caseinates－Determination of scorched particles content
KS J 4205-2018 Methods for quantitative analysis of immobilized trypsin
KS H ISO 5546-2006(2016) Caseins and caseinates－Determination of pH(Reference method)
KS H ISO 5550-2007(2021) Caseins and caseinates－Determination of moisture content(Reference method)
KS H ISO 5546:2021 Caseins and caseinates — Determination of pH(Reference method)
KS J 4202-2023 Methods for quantitative analysis of immunoglobulin
KS J 4202-2018 Methods for quantitative analysis of immunoglobulin
KS J 4205-2023 Methods for quantitative analysis of immobilized trypsin
KS J 4205-2008 Methods for quantitative analysis of immobilized trypsin
KS H ISO 5546-2021 Caseins and caseinates — Determination of pH(Reference method)

Bureau of Indian Standards

IS 7481-1974 How to measure protein efficiency ratio (PER)
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 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 11962-1987 Method for determination of ash content in chymosin casein and caseinate (reference method)
IS 11920-2012 Cassein and Caseinates -Determination of Moisture Content (Reference Method)
IS 11963-1987 Photometric method for determination of lactose content in casein and caseinate
IS 11888-2005 Casiens And Caseinated - Determination Of Contents Of Scorched Particles And Of Extraneous Matter
IS 11888-1987 Method for determination of charred particle content in casein and caseinates
IS 4472 Pt.2-1968 Methods for identification of application categories of dyes on textile materials Part II Wool, silk and other protein fibers
IS 11962-2012 Rennet Caseins and Caseinates—— Determination of Ash (Reference Method)
IS 11918-2017 Caseins and Caseinates - Determination of pH (Reference Method) (First Revision)
IS/ISO 11919-2012 Caseins —— Determination of "Fixed Ash"Â (Reference Method)
IS 11919-1987 Method For Determination Of Fixed Ash In Caseins (reference 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 6248-9:1984 Caseins and caseinates-Method for the determination of scorched particles
BS ISO 5546:2010 Caseins and caseinates - Determination of pH (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 ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference method)
BS ISO 5544:2008 Caseins - Determination of "fixed ash" (Reference method)
BS ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
BS 6248-11:1987 Caseins and caseinates. Method for determination of nitrate and nitrite contents
BS ISO 5550:2006 Caseins and caseinates - Determination of moisture content (Reference method)
BS EN ISO 21415-4:2007 Wheat and wheat flour - Gluten content - Determination of dry gluten from wet gluten by a rapid drying method

Spanish Association for Standardization (UNE)

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-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 34080:1974 ANALYSIS METHODS FOR CHOCOLATES. DETERMINATION OF TOTAL NITROGEN. (PROTEINS).
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)
UNE 34081:1975 ANALYSIS METHODS FOR CHOCOLATES. MILK PROTEINS.
UNE 34-835-1985 milk. Protein content determination by aminoblack method (conventional method)
AENOR UNE 77059:2002 Water quality. Determination of aluminum. Colorimetric method with eriochromocyanin R.
UNE 34835:1985 MILK. DETERMINATION OF PROTEIN CONTENT. AMIDO BLACK DYE-BINDING METHOD. ROUTINE METHOD.

Ente Nazionale Italiano di Unificazione

UNI 22632:2002 Oilseeds - Vegetable proteins content - Determination of total proteins (biuret method)
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 22629:2002 Oilseeds - Vegetable proteins content - Determination of soluble proteins (Bradford method)
UNI ISO 5543:2018 Caseins and caseinates -- Determination of fat content -- Gravimetric method (Reference method)
UNI 22604:1992 Seed and vegetable oils and derived products. Vegetable proteins. Determination of crude protein.

Standard Association of Australia （SAA）

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 1871.9:1976 List of methods for examination of waters Nitrogen (albuminoid)
AS N60:1970 Methods for the sampling and analysis of acid and rennet caseins

Lithuanian Standards Office

LST ISO 5549:2001 Caseins and caseinates. Determination of protein content (Reference method) (identical ISO 5549:1978)
LST ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method) ( ISO 5546:2010, identical)

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)

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 ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
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 ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference method)
NF V03-722:1990 {durum}. Identification of variety by electrophoresis of proteins in polyacrylamide gel containing sodium docecylsulfate.
NF ISO 5544:2008 Caseins - Determination of "fixed ashes" (Reference method)
NF V03-715:1981 Common wheat and {durum} wheat. Splitting of gliadin-type proteins by starch-gel electrophoresis for varietal identification.
NF V04-384*NF ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference 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)

National Standardisation Body (ASRO)

STAS 2213/17-1976 SWEETS Determination of total proteinic content and milk proteinic substance content
STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen by the Kjeldahl method. Spectrophotometric method
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)
STAS 6182/44-1977 WIN E Determination of proteins
SR 5546-1997 Caseins and caseinates - Determination of pH (Reference method)

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 5546:2016 Caseins and caseinates -- Determination of pH (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 ISO 5544:2015 Caseins -- Determination of " fixed ash " (Reference method)
GSO ISO 5546:2015 Caseins and caseinates -- Determination of pH (Reference method)

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

International Dairy Federation (IDF)

IDF 90-2008 Rennet caseins and caseinates - Determination of ash (Reference method)
IDF 78-2006 Caseins and caseinates. Determination of moisture content (Reference method)
IDF 89-2008 Caseins - Determination of "fixed ash" (Reference method)

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)

Food and Agriculture Organization of the United Nations (FAO)

CAC/GL 74-2010 Guidelines on performance criteria and validation of methods for detection, identification and quantification of specific dna sequences and specific proteins in foods
CAC/GL 74-2010(En) Guidelines for performance standards and validation methods for the detection, identification and quantification of specific DNA sequences and specific proteins in foods

Argentine Institute of Standardization

IRAM 15 707-1963 How to measure plant protein in food

American Society for Testing and Materials (ASTM)

ASTM F831-83 Net Protein Ratio (NPR) Test Method
ASTM F830-83 Method for preparing meat, by-products and meat products for determining protein efficiency ratio or net protein ratio
ASTM D2169-66 Method for determining the odor of whey protein
ASTM D6188-17 Standard Test Method for Viscosity of Cellulose by Cuprammonium Ball Fall
ASTM D7818-12 Standard Test Method for Enumeration of Proteolytic Bacteria in Fresh (Uncured) Hides and Skins
ASTM D8238-18 Standard Test Method for Immunological Assay to Quantify Extractable Guayule Natural Rubber (GNR) Proteins

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)