EN ISO 16634-2:2016
Current
The latest, up-to-date edition.
Food products - Determination of the total nitrogen content by combustion according to the Dumas principle and calculation of the crude protein content - Part 2: Cereals, pulses and milled cereal products (ISO 16634-2:2016)
15-06-2016
European Foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of the test sample
9 Procedure
10 Calculation and expression of results
11 Precision
12 Test report
Annex A (informative) - Flowchart for a basic Dumas
apparatus
Annex B (informative) - Schematic diagrams of suitable
types of Dumas apparatus
Annex C (informative) - Equipment calibration
Annex D (informative) - Results of interlaboratory tests
Bibliography
ISO 16634-2:2016 specifies a method for the determination of the total nitrogen content and the calculation of the crude protein content of cereals, pulses and milled cereal products.This method, like the Kjeldahl method (see References [1] and [6]), does not distinguish between protein nitrogen and non-protein nitrogen. For the calculation of the protein content, various conversion factors are used (see 3.2).
| Committee |
CEN/TC 338
|
| DevelopmentNote |
Supersedes CEN ISO/TS 16634-2. (06/2016)
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| DIN EN ISO 16634-2:2016-11 | Identical |
| NS EN ISO 16634-2 : 2016 | Identical |
| I.S. EN ISO 16634-2:2016 | Identical |
| DIN EN ISO 16634-2 E : 2016 | Identical |
| NBN EN ISO 16634-2 : 2016 | Identical |
| SS-EN ISO 16634-2 : 2016 | Identical |
| NEN EN ISO 16634-2 : 2016 | Identical |
| UNE-EN ISO 16634-2:2016 | Identical |
| NF EN ISO 16634-2 : 2016 | Identical |
| ISO 16634-2:2016 | Identical |
| PN EN ISO 16634-2 : 2016 | Identical |
| SN EN ISO 16634-2:2016 | Identical |
| BS EN ISO 16634-2:2016 | Identical |
| UNI EN ISO 16634-2 : 2016 | Identical |
| ISO 5725-1:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions |
| ISO 1871:2009 | Food and feed products General guidelines for the determination of nitrogen by the Kjeldahl method |
| ISO 20483:2013 | Cereals and pulses — Determination of the nitrogen content and calculation of the crude protein content — Kjeldahl method |
| ISO 712:2009 | Cereals and cereal products — Determination of moisture content — Reference method |
| ISO 5725-6:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy values |
| ISO 14891:2002 | Milk and milk products — Determination of nitrogen content — Routine method using combustion according to the Dumas principle |
| 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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