I.S. EN ISO 16634-1:2008
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 1: OILSEEDS AND ANIMAL FEEDING STUFFS
Hardcopy , PDF
English
01-01-2008
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
9 Procedure
9.1 General
9.2 Test portion
9.3 Control of oxygen demand
9.4 Calibration
9.5 Determination
9.6 Detection and integration
10 Calculation and expression of results
10.1 Calculation
10.1.1 Nitrogen content
10.1.2 Crude protein content
10.2 Expression of results
11 Precision
11.1 Interlaboratory tests
11.2 Repeatability
11.3 Reproducibility
12 Test report
Annex A (informative) - Flowchart for the basic design of
a Dumas apparatus
Annex B (informative) - Schemes of suitable types of
Dumas apparatus
Annex C (informative) - Equipment calibration
Annex D (informative) - Examples of factors for converting
nitrogen content to protein content
Annex E (informative) - Result of collaborative studies
Annex F (informative) - Relationship between Dumas nitrogen
and Kjeldahl nitrogen
Bibliography
Defines a method for the determination of the total nitrogen content and the calculation of crude protein content of oilseeds and animal feeding stuffs.
| DocumentType |
Standard
|
| Pages |
44
|
| PublisherName |
National Standards Authority of Ireland
|
| Status |
Current
|
| Standards | Relationship |
| ISO 16634-1:2008 | Identical |
| EN ISO 16634-1:2008 | 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 5983-1:2005 | Animal feeding stuffs — Determination of nitrogen content and calculation of crude protein content — Part 1: Kjeldahl method |
| ISO 20483:2013 | Cereals and pulses — Determination of the nitrogen content and calculation of the crude protein content — Kjeldahl method |
| ISO 664:2008 | Oilseeds Reduction of laboratory sample to test sample |
| ISO 6497:2002 | Animal feeding stuffs Sampling |
| ISO 14891:2002 | Milk and milk products — Determination of nitrogen content — Routine method using combustion according to the Dumas principle |
| ISO 6496:1999 | Animal feeding stuffs — Determination of moisture and other volatile matter content |
| ISO 13690:1999 | Cereals, pulses and milled products Sampling of static batches |
| ISO 5983-2:2009 | Animal feeding stuffs — Determination of nitrogen content and calculation of crude protein content — Part 2: Block digestion and steam distillation method |
| 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 6498:2012 | Animal feeding stuffs — Guidelines for sample preparation |
| ISO 5500:1986 | Oilseed residues Sampling |
| ISO 542:1990 | Oilseeds — Sampling |
| ISO 665:2000 | Oilseeds Determination of moisture and volatile matter content |
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