Soil protein determination method

Soil protein determination method, Total:232 items.

The international standard classification for "Soil protein determination method" includes: food products in general , Fruits. Vegetables , Animal feeding stuffs , Edible oils and fats. Oilseeds , General methods of tests and analysis for food products , Man-made fibres , Biology. Botany. Zoology , Medical Sciences and health care facilities in general , Spices and condiments. Food additives .

The Chinese standard classification for "Soil protein determination method" includes: Food sanitation , Soil and fertilizer in general , Basic standards and general methods , Other cash crops , Livestock and poultry feed and additive , Oil crop and product , Melon, fruit and vegetable planting and product , Cereal crop and forage crop in general , Basic standards and general methods , Food processing and products in general , Chemical fibre in general , Basic standard and general method on forestry , Environmental Condition and General Test Method , Sanitation in general , Flavoring materials .

Group Standards of the People's Republic of China

T/ZGKSL 009-2023 Test method for determination of collagen secreted from human cells induced by recombinant collagen
T/NAIA 0279-2024 Determination of protease activity in soil

Professional Standard - Agriculture

2330药典二部-2010 Appendix VII M Determination of protein content
GB/T 5009.5-1985 Method for determination of protein in foods
201药典三部-2015 Content Determination Method 0731 General Principles of Protein Content Determination Method 50
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
111药典四部-2015 0700 Other Determination Methods 0731 Determination of Protein Content
NY/T 85-1988 Method for determination of soil organic matter
GB 8856-1988 Method for Determination of Crude Protein in Fruit and Vegetable Products
GB 9834-1988 Method for determination of soil organic matter
92药典四部-2020 0700 Other Determination Methods 0731 Determination of Protein Content

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

GB/T 17811-1999 Determination of digestibility in animal protein feeds--Pepsin method
GB/T 5511-1985 Inspection of grain and oilseeds--Methods for determination of crude protein
GB/T 14489.2-1993 Method for determination of crude protein in oilseed
GB/T 5009.5-2003 Determination of protein in foods
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 19495.8-2004 Detection of genetically modified plants and derived products-Protein based methods
GB/T 15673-1995 Method for determination of crude protein in edible fungi
GB/T 14771-1993 Method for determination of protein content in foods
GB/T 6432-1994 Method for the determination of crude protein in feedstuffs

Taiwan Provincial Standard of the People's Republic of China

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 3449-1988 Methods of Test for Milk and Milk Products: The Quantitive Analysis of Protein
CNS 3449-2007 Method of test for milk and milk products - Determination of protein

Professional Standard - Textile

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

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

未注明发布机构

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 5550 E:2020-06 Caseins and caseinates - Determination of moisture content (Reference method)
DIN ISO 5545 E:2020-06 Rennet caseins and caseinates - Determination of ash (Reference method)
DIN ISO 5544 E:2020-06 Caseins - Determination of "fixed ash" (Reference method)
DIN ISO 5546 E:2020-08 Caseins and caseinates - Determination of pH (Reference method)

Professional Standard - Hygiene

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

National Health Commission of the People's Republic of China

WST 341:2011 Hemoglobin measurement reference method

Hebei Provincial Standard of the People's Republic of China

DB13/T 1098-2009 Determination of protein in feed

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 - Light Industry

QB/T 4363-2012 Determination of Immunoglobulin Egg Yolk (IgY) Activity in Toothpastes

Professional Standard - Business

SB/T 10317-1999 Measurement of proteinase activity

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

Korean Agency for Technology and Standards (KATS)

KS H 1204-2012 Testing method for crude proteins content
KS H 1204-2001 Testing method for crude proteins content
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 H 1204-2021 Testing method for crude proteins content
KS H ISO 5546:2006 Caseins and caseinates－Determination of pH(Reference method)
KS I ISO 16072-2009(2014) Soil quality－Laboratory methods for determination of microbial soil respiration
KS I ISO 16072-2014 Soil quality－Laboratory methods for determination of microbial soil respiration
KS J 4201-2023 Methods for quantitative analysis of serum albumin
KS I ISO 11277:2005 Soil quality－Determination of particle size distribution inmineral soil material(Method by sieving and sedimentationfollowing removal of soluble salts, organic matter and carbonates)
KS J 4201-2008 Methods for quantitative analysis of serum albumin
KS H ISO 5546-2006(2016) Caseins and caseinates－Determination of pH(Reference method)
KS H ISO 5739:2006 Caseins and caseinates－Determination of scorched particles content
KS I ISO 16072:2009 Soil quality－Laboratory methods for determination of microbial soil respiration

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

KR-KS

KS H 1204-2022 Testing method for crude proteins content
KS H ISO 5549-2021 Caseins and caseinates — Determination of protein content(Reference method)

RU-GOST R

GOST 25179-1990 Milk. Methods for determination of protein
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 25011-1981 Meat and meat products. Methods of protein determination
GOST 25011-2017 Meat and meat products. Protein determination methods
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 51467-1999 Caseins and caseinates. Method for determination of pH
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 20264.2-1988 Enzyme preparations. Methods for determination of proteolytic activity
GOST R 51454-1999 Caseins and caseinates. Method of determination of nitrate and nitrite contents
GOST 27753.10-1988 Greenhouse grounds method for determination of organic matter
GOST 28074-1989 Vegetable fodder. Method for the determination of crude protein solubility
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 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

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 56 0186 Cast.12-1981 Testing methods for beer. art 12. etermination of proteins
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
CSN 57 0111-8-2002 Testing methods for casein and caseinates - Determination of titratable acidity
CSN 57 0111-7-2002 Testing methods for casein and caseinates - Determination of ash
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
CSN 57 0105 Cast.5-1984 Powdered and condensed milk products. Testing methods. Determination of protein content
CSN 46 7092-27-1998 Testing methods for feeding stuffs - Part 27: Determination of the protein content
CSN 57 0111 Cast.9-1979 Testing methods for casein. Determination of solubility index
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

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 11277:2009 Soil quality - Determination of particle size distribution in mineral soil material - Method by sieving and sedimentation
ISO 11277:1998 Soil quality - Determination of particle size distribution in mineral soil material - Method by sieving and sedimentation
ISO 19204:2017 Soil quality - Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach)
ISO/CD 18386 Soil quality — Screening method for soil temperature — Measurement by IR thermometer
ISO 5546:1979 Caseins and caseinates; Determination of pH (Reference method)
ISO 16072:2002 Soil quality - Laboratory methods for determination of microbial soil respiration

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 11962-1987 Method for determination of ash content in chymosin casein and caseinate (reference method)
IS 11888-1987 Method for determination of charred particle content in casein and caseinates
IS 11963-1987 Photometric method for determination of lactose content in casein and caseinate

SCC

AENOR UNE 34400-7:1967 Test methods for wheat flour. Determination of protein.
UNE 34400-7:1967 TEST METHODS OF WHEAT FLOUR. PROTEIN DETERMINATION
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)
BS 6248-10:1986 Caseins and caseinates-Method for determination of fat (gravimetric reference method)
AS 1289.D1.1:1977 Methods of testing soil for engineering purposes - Part D - Soil chemical tests - Determination of the organic matter content of a soil (Standard 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)
BS 6248-9:1984 Caseins and caseinates-Method for the determination of scorched particles
AS 1871.9:1976 List of methods for examination of waters Nitrogen (albuminoid)
DANSK DS/EN ISO 16072:2011 Soil quality - Laboratory methods for determination of microbial soil respiration
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-...
BS 7755-3.2:1995 Soil quality. Chemical methods-Determination of pH
BS ISO 16072:2002 Soil quality. Laboratory methods for determination of microbial soil respiration
AS 1289.3.9:1991 Methods of testing soils for engineering purposes, Method 3.9: Soil classification tests - Determination of the cone liquid limit of a soil
AENOR UNE 77059:2002 Water quality. Determination of aluminum. Colorimetric method with eriochromocyanin R.
AS 1289.2.2.1:1992 Methods of testing soils for engineering purposes, Method 2.2.1: Soil moisture content tests - Determination of the total suction of a soil - Standard method
NS-EN ISO 16072:2011 Soil quality — Laboratory methods for determination of microbial soil respiration (ISO 16072:2002)
AS 1289.D3.1:1977 Methods of testing soil for engineering purposes - Part D - Soil chemical tests - Determination of the pH value of a soil - Standard method
DANSK DS/ISO 19204:2017 Soil quality – Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach)
DANSK DS/ISO 20244:2018 Soil quality – Screening method for water content – Determination by refractometry

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

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 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 ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference method)
BS EN ISO 16072:2011 Soil quality. Laboratory methods for determination of microbial soil respiration
BS 7755-5.1:1996 Soil quality - Physical methods - Determination of pore water pressure - Tensiometer method
BS 7755-5.6:1999 Soil quality - Physical methods - Determination of dry bulk density
BS ISO 11274:1998 Soil quality. Determination of the water retention characteristic. Laboratory methods
BS ISO 11274:1999 Soil quality. Determination of the water-retention characteristic. Laboratory methods
BS EN ISO 19204:2022 Soil quality. Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach)
BS ISO 19204:2017 Soil quality. Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach)
BS ISO 5544:2008 Caseins - Determination of "fixed ash" (Reference method)
BS EN ISO 14240-2:1997 Soil quality. Determination of soil microbial biomass. Fumigation-extraction method
BS 7755-3.4:1995 Soil quality. Chemical methods. Determination of the specific electrical conductivity
BS EN ISO 14240-2:2011 Soil quality. Determination of soil microbial biomass. Fumigation-extraction method
BS ISO 17997-2:2005 Milk - Determination of casein-nitrogen content - Direct method
BS ISO 5739:2003 Caseins and caseinates - Determination of contents of scorched particles and of extraneous matter

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 1289.4.1.1:2019 Methods of testing soils for engineering purposes, Method 4.1.1: Soil chemical tests — Determination of the organic matter content of a soil — Normal method
AS 1289.4.4.1:1997 Methods of testing soils for engineering purposes - Soil chemical tests - Determination of the electrical resistivity of a soil - Method for sands and granular materials
AS 1289.3.9.1:2015 Methods of testing soils for engineering purposes, Method 3.9.1: Soil classification tests — Determination of the cone liquid limit of a soil
AS 1289.4.3.1:2021 Methods of testing soils for engineering purposes, Method 4.3.1: Soil chemical tests — Determination of the pH value of a soil — Electrometric method
AS 1289.3.5.1:1995 Methods of testing soils for engineering purposes Method 3.5.1: Soil classification tests-Determination of the soil particle density of a soil-Standard method
AS 1289.4.3.1:1997 Methods of testing soils for engineering purposes - Soil chemical tests - Determination of the pH value of a soil - Electrometric method
AS 1289.4.4.1:2017 Methods of testing soils for engineering purposes, Method 4.4.1: Soil chemical tests — Determination of the electrical resistivity of a soil — Method for fine granular materials

ES-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)
UNE-EN ISO 16072:2011 Soil quality - Laboratory methods for determination of microbial soil respiration (ISO 16072:2002) (Endorsed by AENOR in August of 2011.)
UNE-EN ISO 19204:2022 Soil quality - Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach) (ISO 19204:2017) (Endorsed by Asociación Española de Normalización in November of 2022.)

Lithuanian Standards Office

LST ISO 5549:2001 Caseins and caseinates. Determination of protein content (Reference method) (identical ISO 5549:1978)
LST EN ISO 16072:2011 Soil quality - Laboratory methods for determination of microbial soil respiration (ISO 16072:2002)

German Institute for Standardization

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 ISO 5546:2020-12 Caseins and caseinates - Determination of pH (Reference method) (ISO 5546:2010)
DIN 10466:2001 Determination of whey protein content in total protein of milk and milk products - Polarographic method
DIN EN ISO 16072:2011-09 Soil quality - Laboratory methods for determination of microbial soil respiration (ISO 16072:2002); German version EN ISO 16072:2011
DIN 10470:2011 Milk and milk products - Determination of whey protein content and casein content in total protein - Derivative spectroscopic method
DIN ISO 5550:2020-12 Caseins and caseinates - Determination of moisture content (Reference method) (ISO 5550:2006)
DIN ISO 5545:2020-12 Rennet caseins and caseinates - Determination of ash (Reference method) (ISO 5545:2008)
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 10464:1994 Determination of casein content, casein and whey protein contents in total protein of milk and milk products - Casein-phosphorus method
DIN ISO 5546:2020 Caseins and caseinates - Determination of pH (Reference method) (ISO 5546:2010)
DIN 19746:2005-06 Soil quality - Determination of mineral nitrogen (nitrat and ammonium) in soil profiles (Nmin laboratory method)
DIN ISO 5544:2020-12 Caseins - Determination of "fixed ash" (Reference method) (ISO 5544:2008)

RO-ASRO

STAS 21/6-1973 OILSEED RESIDUES Determination of protein of protein brut content
STAS 2213/17-1976 SWEETS Determination of total proteinic content and milk proteinic substance content
STAS 6182/44-1977 WIN E Determination of proteins
STAS SR 13348-1-1996 Tea. Analysis methods. Determination of proteic nitrogen by the Kjeldahl method. Spectrophotometric method
SR 5546-1997 Caseins and caseinates - Determination of pH (Reference method)
SR ISO 5549:1996 Caseins and caseinates - Determination of protein content (Reference method)

Association Francaise de Normalisation

NF V04-387:1985 Caseins and caseinates. Determination of 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 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 X31-506:1992 Soil quality - Physical methods - Assessment of the structural stability of a soil
NF X31-019*NF ISO 20244:2018 Soil quality - On-site test method to quickly determine gravimetric water contents in soil by refractometry
NF ISO 5545:2008 Rennet caseins and caseinates - Determination of ash (Reference method)
NF X31-233:2020 Soil quality - Determination of the effects of pollutants on soil flora - Laboratory method for determining the composition of foliar fatty acids to assess soil quality
NF ISO 20244:2018 Soil quality - Diagnostic method applicable to water content - Determination by refractometry
NF ISO 5544:2008 Caseins - Determination of "fixed ashes" (Reference method)
NF EN ISO 19204:2022 Soil Quality – Site-Specific Ecological Risk Assessment Procedure for Soil Contamination (TRIAD Approach to Soil Quality)
NF X31-650*NF ISO 19204:2017 Soil quality - Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach)

VN-TCVN

TCVN 5299-2009 Soil quality.Method for the determination of soil erosion by rain
TCVN 4050-1985 Soil.Method for the determination of total organic matter
TCVN 3705-1990 Aquatic products.Method for the determination of total nitrogen and protein content

GSO

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 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 14240-1:2013 Soil quality - Determination of soil microbial biomass - Part 1: Substrate-induced respiration method
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)

AENOR

UNE 34080:1974 ANALYSIS METHODS FOR CHOCOLATES. DETERMINATION OF TOTAL NITROGEN. (PROTEINS).

Danish Standards Foundation

DS/EN ISO 16072:2011 Soil quality - Laboratory methods for determination of microbial soil respiration

AR-IRAM

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

CEN - European Committee for Standardization

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

CU-NC

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

PT-IPQ

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

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)
EN ISO 16072:2011 Soil quality - Laboratory methods for determination of microbial soil respiration
EN ISO 19204:2022 Soil quality - Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach) (ISO 19204:2017)
prEN ISO 19204 rev Soil quality - Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach)

NL-NEN

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

DIN

DIN ISO 16072:2005 Soil quality - Laboratory methods for determination of microbial soil respiration (ISO 16072:2002)

American Society for Testing and Materials (ASTM)

ASTM D3048-89(1995)e1 Standard Test Method of Assay for Alkaline Protease
ASTM D3048-89(2009) Standard Test Method of Assay for Alkaline Protease

ZA-SANS

SANS 21572:2005 Foodstuffs - Methods for the detection of genetically modified organisms and derived products - Protein based methods