BS ISO 14461-1:2005
Current
The latest, up-to-date edition.
Milk and milk products. Quality control in microbiological laboratories Analyst performance assessment for colony counts
Hardcopy , PDF
English
13-09-2005
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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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