PREN ISO 20483 : DRAFT 2012

Name: PREN ISO 20483 : DRAFT 2012
Brand: CEN

Superseded

View Superseded by

CEREALS AND PULSES - DETERMINATION OF THE NITROGEN CONTENT AND CALCULATION OF THE CRUDE PROTEIN CONTENT - KJELDAHL METHOD (ISO/DIS 20483:2012)

Superseded date

01-12-2013

Published date

12-01-2013

Publisher

Comite Europeen de Normalisation

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sampling
8 Preparation of test sample
9 Determination of the moisture content
10 Procedure
11 Expression of results
12 Precision
13 Test report
Annex A (informative) - Results of interlaboratory
        tests
Annex B (informative) - Critical difference and
        practical application of the repeatability
        and reproducibility limits to different
        protein contents
Annex C (informative) - Factors for converting
        nitrogen content to protein content
Bibliography

Defines a method for the determination of the nitrogen content of cereals, pulses and derived products, according to the Kjeldahl method, and a method for calculating the crude protein content.

Committee	TC 338
DocumentType	Draft
PublisherName	Comite Europeen de Normalisation
Status	Superseded
SupersededBy	EN ISO 20483:2013

Standards	Relationship
12/30251275 DC : 0	Identical

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 3188:1978	Starches and derived products — Determination of nitrogen content by the Kjeldahl method — Titrimetric method
ISO 712:2009	Cereals and cereal products — Determination of moisture content — Reference method
ISO 5725-3:1994	Accuracy (trueness and precision) of measurement methods and results — Part 3: Intermediate measures of the precision of a standard measurement method
ISO 5725-6:1994	Accuracy (trueness and precision) of measurement methods and results — Part 6: Use in practice of accuracy values
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 6540:1980	Maize Determination of moisture content (on milled grains and on whole grains)
ISO 24333:2009	Cereals and cereal products — Sampling
ISO 24557:2009	Pulses Determination of moisture content Air-oven method