photometric protein

photometric protein, Total:244 items.

The international standard classification for "photometric protein" includes: Man-made fibres , General methods of tests and analysis for food products , Animal feeding stuffs , Edible oils and fats. Oilseeds , food products in general , Fruits. Vegetables , Animal husbandry and breeding , Protection against crime , Milk and milk products in general , Biology. Botany. Zoology .

The Chinese standard classification for "photometric protein" includes: Chemical fibre in general , Chemical fibre , Basic standards and general methods , Basic standards and general methods , Livestock and poultry feed and additive , Oil crop and product , Other cash crops , Food processing and products in general , Domestic animal and poultry , Food sanitation , Basic standards and general methods , Melon, fruit and vegetable planting and product , Crime judging technology , Fire-fighting equipment and devices , Cereal crop and product , Milk and dairy products , Cereal crop and forage crop in general , Medical apparatus and devices in general , Environmental Condition and General Test Method , Basic standard and general method on forestry .

Professional Standard - Textile

FZ/T 54029-2010 Protein viscose filament yarns
FZ/T 50018-2013 Determination of the protein content of the protein viscose fiber
FZ/T 54028-2010 Protein viscose staple fiber

Professional Standard - Hygiene

WS/T 42-1996 Blood - Determination of carboxyhemoglobin - Spectrophotometric method

农业农村部

NY/T 3298-2018 Determination of crude protein content in vegetable oilseeds—Near-infrared spectroscopy method
NY/T 3608-2020 Determination of collagen content in livestock and poultry bone—Colorimetric method

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

GB/T 25879-2010 Determination of lysozyme in chicken egg white—Spectrophotometry
GB/T 18868-2002 Method for determination of moisture,crude protein,crude fat,crude fibre,lysine and methinione in feeds--Near infrared reflectance spectroscopy
GB/T 19495.8-2004 Detection of genetically modified plants and derived products-Protein based methods
GB/T 17811-2008 Determination of pepsin digestibility in animal protein feeds - Filtration method
GB/T 8856-1988 Method for determination of crude protein in fruit and vegetable products
GB/T 5009.5-2003 Determination of protein in foods
GB/T 5511-1985 Inspection of grain and oilseeds--Methods for determination of crude protein
GB/T 28715-2012 Determination of acidic and neutral protease activity in feed additives—Spetrophotometric method
GB/T 14489.2-1993 Method for determination of crude protein in oilseed
GB/T 14771-1993 Method for determination of protein content in foods
GB/T 15673-1995 Method for determination of crude protein in edible fungi
GB/T 17811-1999 Determination of digestibility in animal protein feeds--Pepsin method

Professional Standard - Public Safety Standards

GA/T 819-2009 Analytical method of acid dyes on the protein fibers
GA/T 2073-2023 Forensic sciences-Examination methods for carboxyhaemoglobin in blood samples-Spectrophotometry
GA/T 52-1993 Quality grading for protein-foam fire extinguishing agent and fluoroprotein-foam fire extinguishing agent

Professional Standard - Agriculture

220药典三部-2020 Content Determination Method 0731 Protein Content Determination Method
NY/T 520-2002 Quality protein maize
92药典四部-2020 0700 Other Determination Methods 0731 Determination of Protein Content
111药典四部-2015 0700 Other Determination Methods 0731 Determination of Protein Content
GB/T 5009.5-1985 Method for determination of protein in foods
176药典三部-2010 Appendix Ⅵ ⅥB protein assay
GB 8856-1988 Method for Determination of Crude Protein in Fruit and Vegetable Products
NY/T 2659-2014 Rapid determination of fat,protein,lactose and total solids in milk—Infrared spectrometry
NY/T 4306-2023 Determination of activity of papain and bromelain-Ultaraviolet spectrophotometry
2330药典二部-2010 Appendix VII M Determination of protein content
NY/T 4362-2023 Feed additives-Determination of keratinase activity-Spectrophotometric method
NY/T 2070-2011 Determination of immunoglobulin G in bovine colostrum and its products-Spectrophotometry

Group Standards of the People's Republic of China

T/GXAS 357-2022 Rapid screening of protein content in fresh wet rice noodles by near infrared spectroscopy
T/CIET 350-2024 Quality requirements for collagen casings
T/SZBX 017-2021 Protein A affinity chromatographic medium
T/ZGKSL 012-2023 Quality requirements for collagen products
T/ESL 22003-2023 Guideline for formulation of laying hens diet with low protein content
T/QGCML 4464-2024 Protein sample storage device
T/ZJBX 10-2021 Determination of the proportion of protein hydrolysates with relative molecular weight less than 1000u in protein feed
T/QGCML 2180-2023 Western Blot detection technical specifications
T/CAB 0063-2020 Detection method of Type Ⅲ collagen promoting cell adhesion Spectrophotometry
T/SZAS 40-2021 Dataset of proteomics
T/SSFS 0006-2023 A rapid evaluation method for quality determination of protein peptide powder products by multi-step infrared spectroscopy

Taiwan Provincial Standard of the People's Republic of China

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 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 5035-1986 Method of Test for Crude Protein in Food

Jilin Provincial Standard of the People's Republic of China

DB22/T 1819-2013 Spectrophotometric method for the determination of acid protease activity in enzyme preparations for feed
DB22/T 294-2020 Method for identification of adulteration of crude protein in corn gluten meal

Hebei Provincial Standard of the People's Republic of China

DB13/T 1091-2009 Determination of acid protease activity in enzyme preparations for feed - spectrophotometric method
DB13/T 5127.14-2019 Determination of Toxic and Hazardous Substances in Extracts of Implantable Medical Devices - Visible-UV Spectrophotometry for Protein Migration
DB13/T 812-2006 Determination of protein solubility in soybeans and their products
DB13/T 1098-2009 Determination of protein in feed
DB13/T 221-1994 Method for testing the purity of corn hybrids, inbred lines, and wheat seeds - protein electrophoresis

Professional Standard - Commodity Inspection

SN/T 0800.3-1999 Cereals and feedstuffs for import and export - Method for the determination of crude protein
SN/T 0803.9-1999 Oil bearing materials for import and export—Method for the determination of crude protein

国家市场监督管理总局、中国国家标准化管理委员会

GB/T 37908-2019 General analysis regulation of the label-free protein microarray based on imaging ellipsometry
GB/T 38172-2019 Protein A affinity chromatographic medium

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

GB/T 34800-2017 Detection method of activity and impurity of proteinase K
GB/T 35809-2018 Method for analysis of forestry biomass—Determination of protein content

RO-ASRO

STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen by the Kjeldahl method. Spectrophotometric method
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
STAS 6182/44-1977 WIN E Determination of proteins

Association Francaise de Normalisation

NF V04-388*NF ISO 5548:2008 Caseins and caseinates - Determination of lactose content - Photometric method.
NF ISO 5548:2008 Caseins and caseinates - Determination of lactose content - Photometric method
NF V03-768*NF EN 15948:2020 Cereals - Determination of moisture and protein - Method using Near-Infrared Spectroscopy in whole kernels
NF V03-768:2015 Cereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels
NF V03-768:2012 Cereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels.
NF V04-387:1985 Caseins and caseinates. Determination of protein content (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 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 EN 15948:2020 Cereals - Determination of water and protein content - Method using near-infrared spectroscopy on whole grains
NF V04-386:1985 Caseins. Determination of free acidity (reference method).
NF V04-386*NF ISO 5547:2008 Caseins - Determination of free acidity (Reference method)
NF ISO 5547:2008 Caseins - Determination of free acidity (Reference method)
NF ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
NF V04-384*NF ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference method).

International Organization for Standardization (ISO)

ISO 5548:2004 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 | IDF 106:2004 Caseins and caseinates — Determination of lactose content — Photometric method
ISO 5548:1980 Caseins and caseinates; Determination of lactose content; Photometric method
ISO 5549:1978 Caseins and caseinates; Determination of protein content (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 20483:2006 Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl 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 5547:2008 Caseins - Determination of free acidity (Reference method)
ISO 5547:1978 Caseins; Determination of free acidity (Reference method)
ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
ISO 5547:2008|IDF 91:2008 Caseins — Determination of free acidity (Reference method)
ISO 5739:2003|IDF 107:2003 Determination of casein and caseinate coke particles and foreign matter content
ISO 8195:1987 Caseins and caseinates; Determination of nitrate and nitrite contents; Method by cadmium reduction and spectrometry
ISO 5546:1979 Caseins and caseinates; Determination of pH (Reference method)
ISO 5547:2008 | IDF 91:2008 Caseins — Determination of free acidity (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 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 5546:2010 Caseins and caseinates - Determination of pH (Reference method)

British Standards Institution (BSI)

BS ISO 5548:2004 Caseins and caseinates - Determination of lactose content - Photometric methods
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 EN 15948:2015 Cereals. Determination of moisture and protein. Method using Near-Infrared-Spectroscopy in whole kernels
BS EN 15948:2012 Cereals. Determination of moisture and protein. Method using Near-Infrared- Spectroscopy in whole kernels
BS 3985:2003(2008) Haemiglobincyanide (cyanmethaemoglobin) preparation as a standard for spectrometric haemoglobinometry
BS 3985:2003 Haemiglobincyanide (cyanmethaemoglobin) preparation as a standard for spectrometric haemoglobinometry
BS ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter
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 5547:2008 Caseins - Determination of free acidity (Reference method)
BS ISO 5546:2010 Caseins and caseinates - Determination of pH (Reference method)
BS EN ISO 21415-3:2007 Wheat and wheat flour - Gluten content - Determination of dry gluten from wet gluten by an oven drying method

GSO

OS GSO ISO 5548:2015 Caseins and caseinates -- Determination of lactose content -- Photometric method
GSO ISO 5548:2015 Caseins and caseinates -- Determination of lactose content -- Photometric method
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)
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)
GSO 2101:2010 Protein-Rich concentrated Nutrient Supplementary foods
OS GSO ISO 5546:2015 Caseins and caseinates -- Determination of pH (Reference method)
GSO ISO 5546:2015 Caseins and caseinates -- Determination of pH (Reference method)
BH GSO ISO 5546:2016 Caseins and caseinates -- Determination of pH (Reference method)

Korean Agency for Technology and Standards (KATS)

KS H ISO 5548:2020 Caseins and caseinates－Determination of lactose content－Photometric method
KS H ISO 5548:2006 Caseins and caseinates－Determination of lactose content－Photometric 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 ISO 5549-2006(2016) Caseins and caseinates－Determination of protein content(Reference method)
KS H ISO 8195:2001 Caseins and caseinates－Determination of nitrate and nitrite contents－Method by cadmium reduction and spectrometry
KS H ISO 8195:2006 Caseins and caseinates－Determination of nitrate and nitrite contents－Method by cadmium reduction and spectrometry
KS H 1204-2012 Testing method for crude proteins content
KS H 1204-2001 Testing method for crude proteins content
KS H 1204-2021 Testing method for crude proteins content
KS H ISO 5547:2006 Caseins－Determination of free acidity(Reference method)
KS H ISO 5547-2006(2016) Caseins－Determination of free acidity(Reference method)
KS H ISO 5547:2021 Caseins — Determination of free acidity(Reference method)
KS H ISO 8195-2006 Caseins and caseinates－Determination of nitrate and nitrite contents－Method by cadmium reduction and spectrometry
KS H ISO 5739:2006 Caseins and caseinates－Determination of scorched particles content
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 H ISO 5546-2006(2016) Caseins and caseinates－Determination of pH(Reference method)
KS J 4201-2023 Methods for quantitative analysis of serum albumin

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 0607:2000 Proteins -- Glucoseoxydase -- Methods for quantitative analysis

KR-KS

KS H ISO 5548-2020 Caseins and caseinates－Determination of lactose content－Photometric method
KS H ISO 5549-2021 Caseins and caseinates — Determination of protein content(Reference method)
KS H ISO 8195-2001 Caseins and caseinates－Determination of nitrate and nitrite contents－Method by cadmium reduction and spectrometry
KS H 1204-2022 Testing method for crude proteins content
KS H ISO 5547-2021 Caseins — Determination of free acidity(Reference method)
KS H ISO 5546-2021 Caseins and caseinates — Determination of pH(Reference method)

RU-GOST R

GOST R 51469-1999 Caseins and caseinates. Photometric method for determination of lactose content
GOST 25179-1990 Milk. Methods for determination of protein
GOST 10846-1991 Grain and products of its processing. Method for determination of protein
GOST R 51470-1999 Caseins and caseinates. Method for determination of protein content
GOST R 57476-2017 Bird food protein. Specifications
GOST 25011-1981 Meat and meat products. Methods of protein determination
GOST 25179-2014 Milk and milk products. Method for determination of protein
GOST 20264.2-1988 Enzyme preparations. Methods for determination of proteolytic activity
GOST 25011-2017 Meat and meat products. Protein determination methods
GOST R 51468-1999 Caseins. Method for determination of free acidity
GOST R 51467-1999 Caseins and caseinates. Method for determination of pH
GOST 31978-2012 Caseins and caseinates. Method for determination of pH
GOST R 51454-1999 Caseins and caseinates. Method of determination of nitrate and nitrite contents
GOST R 57475-2017 Dried egg protein after extraction lysozyme. Specifications
GOST R 51464-1999 Caseins and caseinates. Method for determination of water content

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 0111-8-2002 Testing methods for casein and caseinates - Determination of titratable acidity
CSN 57 0111 Cast.10-1979 Testing methods for casein. Determination of purity
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 0111-12-2002 Testing methods for casein and caseinates - Determination of pH
CSN 57 0111-3-2002 Testing methods for casein and caseinates - Determination of moisture

IN-BIS

IS 11963-1987 Photometric method for determination of lactose content in casein and caseinate
IS 7482-1989 Protein Drinks—Specifications
IS 9095-1979 Specifications for protein gummies
IS 7481-1974 How to measure protein efficiency ratio (PER)
IS 2006-1988 Methods for the quantitative chemical analysis of binary mixtures of protein fibers and certain other non-protein fibers
IS 1167-1965 Casein specifications (food quality)
IS 8665-1977 Specification for protein fortified bread
IS 7219-1973 Methods for determination of protein in food and feed
IS 13650-1993 Glass containers for proteinized food
IS 7487-1986 Specifications for protein-rich cookies

German Institute for Standardization

DIN 10470:2011 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
DIN 10470:1999 Determination of whey protein content and casein content in total protein of milk and milk products - Derivative spectroscopic method
DIN 10470:2011-07 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
DIN 10466:2001 Determination of whey protein content in total protein of milk and milk products - Polarographic 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 10464:1994 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus 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 15948:2012 Cereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels; German version EN 15948:2012
DIN EN 15948:2015 Cereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels; German version EN 15948:2015
DIN 10472:1996 Determination of casein and whey protein contents of milk and milk products - Electrophoretic method
DIN 10450:1983-03 Determination of free acidity of caseins; reference method
DIN EN 15948:2020-12 Cereals - Determination of moisture and protein - Method using Near-Infrared Spectroscopy in whole kernels; German version EN 15948:2020
DIN ISO 5546:2020-12 Caseins and caseinates - Determination of pH (Reference method) (ISO 5546:2010)
DIN ISO 5546 E:2020-08 Caseins and caseinates - Determination of pH (Reference method)

Lithuanian Standards Office

LST ISO 5548:2004 Caseins and caseinates. Determination of lactose content. Photometric method (idt ISO 5548:2004)
LST ISO 5549:2001 Caseins and caseinates. Determination of protein content (Reference method) (identical ISO 5549:1978)

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

SCC

BS 3985:1978 Specification for cyanmethaemoglobin (haemiglobincyanide) solution for photometric haemoglobinometry
BS 3985:1966 Specification for cyanmethaemoglobin solution for photometric haemoglobinometry
NS-EN 15948:2020 Cereals — Determination of moisture and protein — Method using Near-Infrared Spectroscopy in whole kernels
DIN 10470 E:2010 Draft Document - Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
NS-EN 15948:2012 Cereals — Determination of moisture and protein — Method using Near-Infrared-Spectroscopy in whole kernels
NS-EN 15948:2015 Cereals — Determination of moisture and protein — Method using Near-Infrared-Spectroscopy in whole kernels
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)
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)
AENOR UNE 34400-7:1967 Test methods for wheat flour. Determination of protein.
AENOR UNE 77059:2002 Water quality. Determination of aluminum. Colorimetric method with eriochromocyanin R.
BS 6248-10:1986 Caseins and caseinates-Method for determination of fat (gravimetric reference method)
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)
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-...
12/30228371 DC BS ISO 15625. Protein fibres. Electronic test method for defects and evenness of raw silk

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 N60:1970 Methods for the sampling and analysis of acid and rennet caseins
AS K89:1953 Protein adhesives for plywood

Society of Automotive Engineers (SAE)

SAE AMS1800-2011 FOAM, FIRE EXTINGUISHING LIQUID Protein and Fluoroprotein

American Society for Testing and Materials (ASTM)

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

European Committee for Standardization (CEN)

EN 15948:2012 Cereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels
EN 15948:2015 Cereals - Determination of moisture and protein - Method using Near-Infrared-Spectroscopy in whole kernels

Spanish Association for Standardization (UNE)

UNE 64102:1977 MIXED FEEDS AND RAW MATERIALS. TOTAL PROTEIN (RAW PROTEIN)
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 34081:1975 ANALYSIS METHODS FOR CHOCOLATES. MILK PROTEINS.
UNE 34400-7:1967 TEST METHODS OF WHEAT FLOUR. PROTEIN DETERMINATION
UNE-EN 15948:2021 Cereals - Determination of moisture and protein - Method using Near-Infrared Spectroscopy in whole kernels

CU-NC

NC 57-98-1-1986 Clinical Methods and Aids. Photometric Determination of Hemoglobin in Blood. Chemical Analysis Method
NC 86-05-1984 Cereals. Flours Determination of Protein

Danish Standards Foundation

DS/EN 15948:2020 Cereals – Determination of moisture and protein – Method using Near-Infrared Spectroscopy in whole kernels

PL-PKN

PN-EN 15948-2021-03 E Cereals -- Determination of moisture and protein -- Method using Near-Infrared Spectroscopy in whole kernels
PN P04901-1987 Determination of keratin matters solubility in reagents for chemical damage characterictic

HU-MSZT

MSZ 21340-1980 animal protein feed
MSZ KGST 1422-1978 Determination of protein content of phosphorus and phosphorus inorganic mixtures

GOSTR

GOST 34551-2019 Сonfectionery. Method for determination of mass fraction of protein
GOST 34454-2018 Dairy products. Determination of protein content by the Kjeldahl method

International Dairy Federation (IDF)

IDF 91-2008 Caseins - Determination of free acidity (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

PT-IPQ

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