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BS ISO 14461-1:2005

Current
Current

The latest, up-to-date edition.

Milk and milk products. Quality control in microbiological laboratories Analyst performance assessment for colony counts
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

13-09-2005

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Diluent, culture media and reagents
6 Apparatus and glassware
7 Sampling
8 Preparation of test sample
   8.1 Milk
   8.2 Dried milk
9 Procedure
   9.1 General
   9.2 Number of decimal dilution steps
   9.3 Preparation of first decimal dilution
   9.4 Preparation of further decimal dilutions
   9.5 Melting the medium
   9.6 Preparation of binary dilutions and inoculation of
        the medium
   9.7 Incubation
   9.8 Randomization and counting of colonies
10 Statistical evaluation
   10.1 Adequacy of the data set
   10.2 Evaluation of the complete data set
Annex A (informative) Weighted mean and homogeneity
                      testing of colony counts
Annex B (Informative) BASIC programme for calculating
                      the likelihood ratio index G[2]
Bibliography

Describes a procedure for testing the performance of the colony-count technique within a laboratory by establishing the within-laboratory variability of its technique and identifying those steps that are associated with excessive variability.

Committee
AW/5
DevelopmentNote
Supersedes 03/307075 DC. (09/2005)
DocumentType
Standard
Pages
44
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 14461-1:2005 Identical

ISO 835-4:1981 Laboratory glassware Graduated pipettes Part 4: Blow-out pipettes
ISO 7218:2007 Microbiology of food and animal feeding stuffs General requirements and guidance for microbiological examinations
ISO 707:2008 Milk and milk products — Guidance on sampling
ISO 648:2008 Laboratory glassware — Single-volume pipettes
ISO 4788:2005 Laboratory glassware Graduated measuring cylinders
ISO 8261:2001 Milk and milk products General guidance for the preparation of test samples, initial suspensions and decimal dilutions for microbiological examination

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