Methods for Identifying Proteins

Methods for Identifying Proteins, Total:240 items.

The international standard classification for "Methods for Identifying Proteins" includes: food products in general , Animal feeding stuffs , Edible oils and fats. Oilseeds , Fruits. Vegetables , Biology. Botany. Zoology , Milk and processed milk products , Man-made fibres , Medical Sciences and health care facilities in general , Protection against crime .

The Chinese standard classification for "Methods for Identifying Proteins" 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 , Chemical fibre in general , Grain processing and products , Sanitation in general , Crime judging technology .

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 3449-2007 Method of test for milk and milk products - Determination of protein
CNS 2770-5-1986 Method of Test for Feeds : Determination of Crude 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 2713-1978 Method for Determining of Digest Protein of Feather Meal

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

GB/T 17811-2025 Determination of pepsin digestibility for animal-derived protein feeds—Filtration method
GB/T 34800-2017 Detection method of activity and impurity of proteinase K
GB/T 15673-1995 Method for determination of crude protein in edible fungi
BJS 201707 Identification of plant-derived ingredients in plant protein beverages
GB/T 5009.5-2003 Determination of protein in foods
GB/T 8856-1988 Method for determination of crude protein in fruit and vegetable products
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 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 6432-1994 Method for the determination of crude protein in feedstuffs
GB/T 5009.5-1985 Method for determination of protein in foods
GB/T 5413.1-1997 Milk powder and formula foods for infant and young children-Determination of protein
GB/T 14771-1993 Method for determination of protein content in foods
GB/T 14489.2-1993 Method for determination of crude protein in oilseed
GB/T 5511-1985 Inspection of grain and oilseeds--Methods for determination of crude protein

Group Standards of the People's Republic of China

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

Professional Standard - Agriculture

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

Professional Standard - Textile

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

Professional Standard - Commodity Inspection

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

未注明发布机构

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

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 - 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

Professional Standard - Public Safety Standards

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

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

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 10466:2001 Determination of whey protein content in total protein of milk and milk products - Polarographic method
DIN ISO 5546 E:2020-08 Caseins and caseinates - Determination of pH (Reference 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 10464:1994 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus 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 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 5550:2020 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN ISO 5544:2020-12 Caseins - Determination of "fixed ash" (Reference method) (ISO 5544:2008)
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 5544 E:2020-06 Caseins - Determination of "fixed ash" (Reference method)
DIN ISO 5546:2020-08 Draft Document - Caseins and caseinates - Determination of pH (Reference method) (ISO 5546:2010); Text in German and English

AT-ON

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

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 25011-1981 Meat and meat products. Methods of protein determination
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 25011-2017 Meat and meat products. Protein determination methods
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 32148-2013 Foodstuffs of processed poultry eggs. Method for identification of poultry egg species
GOST 13979.3-1968 Oilcakes oil-meals. Methods of determination of soluble proteins
GOST 10846-1991 Grain and products of its processing. Method for determination of protein
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 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 28075-1989 Vegetable fodder. Method for the determination of crude protein splitting
GOST 28074-1989 Vegetable fodder. Method for the determination of crude protein solubility
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 R 53761-2009 Milk. The identification of protein composition by use the electrophoresis in polyakrilamide gel
GOST 20264.2-1988 Enzyme preparations. Methods for determination of proteolytic activity

CZ-CSN

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

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|IDF 115:2010 Determination of pH value of casein and caseinate (standard method)
ISO 5546:2010 | IDF 115:2010 Caseins and caseinates — Determination of pH (Reference method)
ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference 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 5550:2006 Caseins and caseinates - Determination of moisture content (Reference method)
ISO 5739:2003|IDF 107:2003 Determination of casein and caseinate coke particles and foreign matter content
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 5549:2006 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 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 4202-2008 Methods for quantitative analysis of immunoglobulin
KS J 0023-2025 Biotechnology — Quantitative analysis method for proteins produced by biotechnology
KS H ISO 5546:2021 Caseins and caseinates — Determination of pH(Reference method)
KS H ISO 5550-2007(2021) Caseins and caseinates－Determination of moisture content(Reference method)
KS J 4205-2018 Methods for quantitative analysis of immobilized trypsin
KS H ISO 5739:2006 Caseins and caseinates－Determination of scorched particles content
KS H ISO 5546-2006(2016) Caseins and caseinates－Determination of pH(Reference method)
KS J 4202-2018 Methods for quantitative analysis of immunoglobulin
KS J 4202-2023 Methods for quantitative analysis of immunoglobulin
KS J 4205-2023 Methods for quantitative analysis of immobilized trypsin
KS H ISO 5546-2021 Caseins and caseinates — Determination of pH(Reference method)
KS J 4205-2008 Methods for quantitative analysis of immobilized trypsin

IN-BIS

IS 7481-1974 How to measure protein efficiency ratio (PER)
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 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 4472 Pt.2-1968 Methods for identification of application categories of dyes on textile materials Part II Wool, silk and other protein fibers

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 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 11962-2012 Rennet Caseins and Caseinates—— Determination of Ash (Reference Method)
IS/ISO 11919-2012 Caseins —— Determination of "Fixed Ash"Â (Reference Method)
IS 11918-2017 Caseins and Caseinates - Determination of pH (Reference Method) (First Revision)
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 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
BS ISO 5544:2008 Caseins - Determination of "fixed ash" (Reference method)
BS 6248-11:1987 Caseins and caseinates. Method for determination of nitrate and nitrite contents

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

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)

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

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)

RO-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

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)

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)

VN-TCVN

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)

CEN - European Committee for Standardization

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

IX-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

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

AR-IRAM

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

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)

European Committee for Standardization (CEN)

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)

NL-NEN

NEN 3145-1966 Feeding stuffs. Methodsof analysis. Determination of crude protein

The Directorate General of Specifications and Metrology (DGSM)

OS GSO ISO 5546:2015 Caseins and caseinates -- Determination of pH (Reference method)

PT-IPQ

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

CU-NC

NC 86-05-1984 Cereals. Flours Determination of Protein