EN ISO 14891:2002
Current
The latest, up-to-date edition.
Milk and milk products - Determination of nitrogen content - Routine method using combustion according to the Dumas principle (ISO 14891:2002)
01-03-2002
Foreword
1 Scope
2 Normative reference
3 Term and definition
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
8.1 General
8.2 Liquid test samples
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
10.2 Expression of results
11 Precision
11.1 Interlaboratory test
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) Comparison of results using the
Dumas method with those obtained by the
Kjeldahl method
Bibliography
ISO 14891|IDF 185:2002 specifies a routine method for the determination of the total nitrogen content of milk and milk products.
| Committee |
CEN/TC 302
|
| DocumentType |
Standard
|
| PublisherName |
Comite Europeen de Normalisation
|
| Status |
Current
|
| Standards | Relationship |
| NBN EN ISO 14891 : 2002 | Identical |
| BS EN ISO 14891:2002 | Identical |
| NEN EN ISO 14891 : 2002 | Identical |
| UNE-EN ISO 14891:2002 | Identical |
| NF EN ISO 14891 : 2003 | Identical |
| UNI EN ISO 14891 : 2002 | Identical |
| SN EN ISO 14891 : 2002 | Identical |
| PN EN ISO 14891 : 2004 | Identical |
| NS EN ISO 14891 : 1ED 2002 | Identical |
| SS-EN ISO 14891 : 2002 | Identical |
| I.S. EN ISO 14891:2002 | Identical |
| ISO 14891:2002 | Identical |
| DIN EN ISO 14891:2002-07 | Identical |
| ISO 8968-1:2014 | Milk and milk products — Determination of nitrogen content — Part 1: Kjeldahl principle and crude protein calculation |
| ISO 5725-1:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions |
| ISO 707:2008 | Milk and milk products — Guidance on sampling |
| ISO 8968-2:2001 | Milk Determination of nitrogen content Part 2: Block-digestion method (Macro method) |
| EN ISO 8968-1:2014 | Milk and milk products - Determination of nitrogen content - Part 1: Kjeldahl principle and crude protein calculation (ISO 8968-1:2014) |
| 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 6732:2010 | Milk and milk products — Determination of iron content — Spectrometric method (Reference method) |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.