EN ISO 8968-1:2014
Current
The latest, up-to-date edition.
Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation (ISO 8968-1:2014)
05-02-2014
Forewords
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
9 Procedures
10 Calculation and expression of results
11 Precision
12 Test report
Annex A (informative) - Test portion
Annex B (informative) - Collaborative trials
Bibliography
ISO 8968-1|IDF 20-1:2014 specifies a method for the determination of the nitrogen content and crude protein calculation of milk and milk products by the Kjeldahl principle, using traditional and block digestion methods. The methods are applicable to: liquid cow's (whole, partially skimmed or skimmed milk), goat's and sheep's whole milk; hard, semi-hard and processed cheese; dried milk and dried milk products (including milk-based infant formulae, milk protein concentrate, whey protein concentrate, casein and caseinate). The methods are not applicable to samples containing ammonium caseinate.
| Committee |
CEN/TC 302
|
| DevelopmentNote |
Supersedes PREN ISO 8968-1 & EN ISO 8968-2. (02/2014)
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Supersedes |
| Standards | Relationship |
| NBN EN ISO 8968-1 : 2014 | Identical |
| ISO 8968-1:2014 | Identical |
| UNI EN ISO 8968-1 : 2014 | Identical |
| NEN EN ISO 8968-1 : 2014 | Identical |
| DIN EN ISO 8968-1:2014-06 | Identical |
| PN EN ISO 8968-1 : 2014 | Identical |
| UNE-EN ISO 8968-1:2014 | Identical |
| NS EN ISO 8968-1 : 2014 | Identical |
| SN EN ISO 8968-1 : 2014 | Identical |
| I.S. EN ISO 8968-1:2014 | Identical |
| SS-EN ISO 8968-1:2014 | Identical |
| NF EN ISO 8968-1 : 2014 | Identical |
| BS EN ISO 8968-1:2014 | Identical |
| DIN EN ISO 8968-1:2002-06 | Identical |
| BS EN ISO 14891:2002 | Milk and milk products. Determination of nitrogen content. Routine method using combustion according to the Dumas principle |
| ISO 14891:2002 | Milk and milk products — Determination of nitrogen content — Routine method using combustion according to the Dumas principle |
| EN ISO 14891:2002 | Milk and milk products - Determination of nitrogen content - Routine method using combustion according to the Dumas principle (ISO 14891:2002) |
| ISO 5725-1:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions |
| ISO 385:2005 | Laboratory glassware — Burettes |
| ISO 707:2008 | Milk and milk products — Guidance on sampling |
| 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 8655-3:2002 | Piston-operated volumetric apparatus Part 3: Piston burettes |
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