ISO 14461-2:2005
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The latest, up-to-date edition.
Milk and milk products Quality control in microbiological laboratories Part 2: Determination of the reliability of colony counts of parallel plates and subsequent dilution steps
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English
12-04-2005
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ISO 14461-2|IDF 169-2:2005 describes a routine procedure for the evaluation of results of the enumeration of microorganisms using colony-count methods with subsequent 10-fold dilution steps and one plate or two parallel plates within each dilution step.
This routine procedure is applied regularly in each laboratory performing colony counts. It provides criteria for the acceptability of differences between the results from parallel plates and subsequent dilution steps, as follows.
The results (colony counts) obtained from parallel plates are compared with tabulated limits for given colony counts. If these limits are exceeded, a technical problem when performing the parallel determinations may be indicated.
The results (sums of colony counts) of two parallel plates of two subsequent 10-fold dilution steps are compared with tabulated limits for given sums of colony counts. If these limits are exceeded, a technical problem when performing the dilutions may be indicated.
If the limits mentioned above are exceeded in more cases than expected, this indicates that the test procedure lacks reliability.
| DevelopmentNote |
Supersedes ISO/DIS 14461-2 Also numbered as IDF 169-2 (04/2005)
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| DocumentType |
Standard
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| Pages |
18
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| PublisherName |
International Organization for Standardization
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| Status |
Current
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| Standards | Relationship |
| BS ISO 14461-2:2005 | Identical |
| 17/30291335 DC : 0 | BS EN ISO 8199 - WATER QUALITY - GENERAL REQUIREMENTS AND GUIDANCE FOR MICROBIOLOGICAL EXAMINATIONS BY CULTURE |
| DIN EN ISO 7218:2014-09 | MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - GENERAL REQUIREMENTS AND GUIDANCE FOR MICROBIOLOGICAL EXAMINATIONS (ISO 7218:2007 + AMD 1:2013, CORRECTED VERSION 2014-04-15) |
| I.S. EN ISO 7218:2007 | MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - GENERAL REQUIREMENTS AND GUIDANCE FOR MICROBIOLOGICAL EXAMINATIONS (ISO 7218:2007) |
| 05/30134004 DC : DRAFT MAY 2005 | EN ISO 7218 - MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - GENERAL REQUIREMENTS AND GUIDANCE FOR MICROBIOLOGICAL EXAMINATIONS |
| ISO 29981:2010 | Milk products — Enumeration of presumptive bifidobacteria — Colony count technique at 37 degrees C |
| ISO 7218:2007 | Microbiology of food and animal feeding stuffs — General requirements and guidance for microbiological examinations |
| EN ISO 7218 : 2007 COR 2014 | MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - GENERAL REQUIREMENTS AND GUIDANCE FOR MICROBIOLOGICAL EXAMINATIONS (ISO 7218:2007/AMD 1:2013, CORRECTED VERSION 2014-04-15) |
| BIS IS 16122 : 2013 | MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - GENERAL REQUIREMENTS AND GUIDANCE FOR MICROBIOLOGICAL EXAMINATIONS |
| BS ISO 29981:2010 | Milk products. Enumeration of presumptive bifidobacteria. Colony count technique at 37 °C |
| 08/30177160 DC : DRAFT JAN 2008 | BS ISO 29981 - MILK PRODUCTS - ENUMERATION OF PRESUMPTIVE BIFIDOBACTERIA - COLONY COUNT TECHNIQUE AT 37 DEGREES C |
| BS EN ISO 7218 : 2007 | MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - GENERAL REQUIREMENTS AND GUIDANCE FOR MICROBIOLOGICAL EXAMINATIONS |
| ISO 14461-1:2005 | Milk and milk products Quality control in microbiological laboratories Part 1: Analyst performance assessment for colony counts |
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