Milk. Determination of urea content. Enzymatic method using difference in pH (Reference method)

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

28-02-2007

Publisher

British Standards Institution

Foreword
1 Scope
2 Terms and definitions
3 Principle
4 Reagents
5 Apparatus
6 Sampling
7 Preparation of test sample
8 Procedure
   8.1 General
   8.2 Blank determination
   8.3 Calibration
   8.4 Checking the calibration
   8.5 Determination
   8.6 Checking the stability
   8.7 Checking the contamination of the electrodes
   8.8 Cleaning procedure
9 Maintenance of the electrodes
   9.1 Regeneration
   9.2 Strong regeneration
10 Calculation and expression of results
   10.1 Calculation
   10.2 Expression of results
11 Precision
   11.1 Interlaboratory tests
   11.2 Repeatability
   11.3 Reproducibility
12 Test report
Annex A (informative) Differential pH apparatus
Annex B (informative) Interlaboratory tests
Bibliography

Provides an enzymatic method for the determination of the urea content of milk by measurement of the difference in pH.

Committee	AW/5
DevelopmentNote	Renumbers and supersedes BS ISO 14637 2006 version incorporates amendment 16903 to BS ISO 14637 Supersedes 02/704618 DC (02/2007)
DocumentType	Standard
Pages	22
PublisherName	British Standards Institution
Status	Current
Supersedes	02/704618 DC : DRAFT MAY 2002 BS ISO 14637 : 2004 AMD 16903

Standards	Relationship
NS EN ISO 14637 : 1ED 2006	Identical
ISO 14637:2004	Identical
NF EN ISO 14637 : 2007	Identical
NEN EN ISO 14637 : 2007	Identical
UNE-EN ISO 14637:2007	Identical
UNI EN ISO 14637 : 2007	Identical
DIN EN ISO 14637:2007-03	Identical
EN ISO 14637:2006	Identical
SN EN ISO 14637 : 2007	Identical
NBN EN ISO 14637 : 2007	Identical
I.S. EN ISO 14637:2006	Identical

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 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

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BS EN ISO 14637:2006

Milk. Determination of urea content. Enzymatic method using difference in pH (Reference method)

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Abstract

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