UNI EN ISO 5983-2 : 2009
Current
The latest, up-to-date edition.
ANIMAL FEEDING STUFFS - DETERMINATION OF NITROGEN CONTENT AND CALCULATION OF CRUDE PROTEIN CONTENT - PART 2: BLOCK DIGESTION AND STEAM DISTILLATION METHOD
26-08-2009
Foreword
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 Determination
9.4 Blank test
9.5 Recovery tests
10 Calculation and expression of results
10.1 Calculation
10.2 Calculation of crude protein content
10.3 Expression of crude protein content results
11 Precision
11.1 Interlaboratory tests
11.2 Repeatability
11.3 Reproducibility
12 Test report
Annex A (informative) Results of interlaboratory tests
Annex B (informative) Results of a profiency test; comparison
of the colorimetric and potentiometric endpoint determination
of the titration
Bibliography
Describes a method for the determination of nitrogen content of animal feeding stuffs according to the Kjeldahl method, and a method for the calculation of the crude protein content.
| Committee |
CT 3
|
| DocumentType |
Standard
|
| PublisherName |
Ente Nazionale Italiano di Unificazione (UNI)
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| ISO 5983-2:2009 | Identical |
| NEN EN ISO 5983-2 : 2009 | Identical |
| NBN EN ISO 5983-2 : 2009 | Identical |
| EN ISO 5983-2:2009 | Identical |
| NF EN ISO 5983-2 : 2009 | Identical |
| NS EN ISO 5983-2 : 2009 | Identical |
| BS EN ISO 5983-2:2009 | Identical |
| UNE-EN ISO 5983-2:2009 | Identical |
| I.S. EN ISO 5983-2:2009 | Identical |
| DIN EN ISO 5983-2:2009-10 | Identical |
| ISO 5725-1:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions |
| ISO 8655-5:2002 | Piston-operated volumetric apparatus Part 5: Dispensers |
| 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 385:2005 | Laboratory glassware — Burettes |
| ISO 6497:2002 | Animal feeding stuffs Sampling |
| ISO 8655-2:2002 | Piston-operated volumetric apparatus Part 2: Piston pipettes |
| 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 8655-3:2002 | Piston-operated volumetric apparatus Part 3: Piston burettes |
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