BS ISO 14637 : 2004 AMD 16903

Name: BS ISO 14637 : 2004 AMD 16903
Brand: BSI

Superseded

View Superseded by

MILK - DETERMINATION OF UREA CONTENT - ENZYMATIC METHOD USING DIFFERENCE IN PH (REFERENCE METHOD)

Superseded date

28-02-2007

Published date

23-11-2012

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

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

Committee	AW/5
DevelopmentNote	Supersedes 02/704618 DC (11/2004) Renumbered and superseded by BS EN ISO 14637 (02/2007)
DocumentType	Standard
PublisherName	British Standards Institution
Status	Superseded
SupersededBy	BS EN ISO 14637:2006
Supersedes	02/704618 DC : DRAFT MAY 2002

Standards	Relationship
ISO 14637:2004	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