BS 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 Oilseeds and animal feeding stuffs
Hardcopy , PDF
English
30-11-2008
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
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.