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CEN
EN ISO 20483:2013

EN ISO 20483:2013

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Current

The latest, up-to-date edition.

Cereals and pulses - Determination of the nitrogen content and calculation of the crude protein content - Kjeldahl method (ISO 20483:2013)

Published date

04-12-2013

Publisher

Comite Europeen de Normalisation

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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
9 Determination of the moisture content
10 Procedure
11 Expression of results
12 Precision
13 Test report
Annex A (informative) - Results of interlaboratory tests
Annex B (informative) - Critical difference and practical
        application of the repeatability and reproducibility
        limits to different protein contents
        protein contents
Annex C (informative) - Factors for converting nitrogen
        content to protein content
Bibliography

ISO 20483:2013 specifies a method for the determination of the nitrogen content of cereals, pulses and derived products, according to the Kjeldahl method, and a method for calculating the crude protein content. The method does not distinguish between protein nitrogen and non-protein nitrogen.

Committee
CEN/TC 338
DevelopmentNote
Supersedes PREN ISO 20483. (12/2013)
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current
Supersedes

14/30301619 DC : 0 BS EN 15948 - CEREALS - DETERMINATION OF MOISTURE AND PROTEIN - METHOD USING NEAR-INFRARED-SPECTROSCOPY IN WHOLE KERNELS
DIN EN 15948:2015-06 CEREALS - DETERMINATION OF MOISTURE AND PROTEIN - METHOD USING NEAR-INFRARED-SPECTROSCOPY IN WHOLE KERNELS
UNE-EN 15948:2015 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
I.S. EN 15948:2015 CEREALS - DETERMINATION OF MOISTURE AND PROTEIN - METHOD USING NEAR-INFRARED-SPECTROSCOPY IN WHOLE KERNELS
BS EN 15948:2015 Cereals. Determination of moisture and protein. Method using Near-Infrared-Spectroscopy in whole kernels
09/30201998 DC : 0 BS EN 15948 - CEREALS - DETERMINATION OF MOISTURE AND PROTEIN - METHOD USING NEAR-INFRARED-TRANSMITTANCE IN COMBINATION WITH AN ARTIFICIAL NEURAL NETWORK (ANN) PREDICTION MODEL AND ASSOCIATED DATABASE

ISO 1871:2009 Food and feed products General guidelines for the determination of nitrogen by the Kjeldahl method
ISO 5983-1:2005 Animal feeding stuffs — Determination of nitrogen content and calculation of crude protein content — Part 1: Kjeldahl method
ISO 3188:1978 Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method
ISO 712:2009 Cereals and cereal products — Determination of moisture content — Reference method
ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate measures of the precision of a standard measurement method
ISO 5725-6:1994 Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy values
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 6540:1980 Maize Determination of moisture content (on milled grains and on whole grains)
ISO 24333:2009 Cereals and cereal products — Sampling
ISO 24557:2009 Pulses Determination of moisture content Air-oven method

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