BS EN ISO 20483:2013
Current
The latest, up-to-date edition.
Cereals and pulses. Determination of the nitrogen content and calculation of the crude protein content. Kjeldahl method
Hardcopy , PDF
English
31-12-2013
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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
Annex C (informative) - Factors for converting nitrogen
content to protein content
Bibliography
Defines 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.
| Committee |
AW/4
|
| DevelopmentNote |
Supersedes 05/30131416 DC. (11/2006) Supersedes 12/30251275 DC. (01/2014)
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This International Standard 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. If it is important to determine the non-protein nitrogen content, an appropriate method would be applied.
NOTE In certain cases, full recovery of the nitrogen in nitrates and nitrites is not possible by this method.
| Standards | Relationship |
| ISO 20483:2013 | Identical |
| NBN EN ISO 20483 : 2014 | Identical |
| DIN EN ISO 20483:2014-03 | Identical |
| UNI EN ISO 20483 : 2014 | Identical |
| NEN EN ISO 20483 : 2013 | Identical |
| NS EN ISO 20483 : 2013 | Identical |
| NF EN ISO 20483 : 2014 | Identical |
| I.S. EN ISO 20483:2013 | Identical |
| UNE-EN ISO 20483:2014 | Identical |
| EN ISO 20483:2013 | Identical |
| SN EN ISO 20483:2014 | Identical |
| 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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