NEN EN ISO 7932 : 2004
Current
The latest, up-to-date edition.
MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - HORIZONTAL METHOD FOR THE ENUMERATION OF PRESUMPTIVE BACILLUS CEREUS - COLONY-COUNT TECHNIQUE AT 30 DEGREES C
12-01-2013
Foreword
0 Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Dilution fluid, culture media and reagents
6 Apparatus and glassware
7 Sampling
8 Preparation of test sample
9 Procedure
9.1 Test portion, initial suspension and dilutions
9.2 Inoculation and incubation
9.3 Counting of the colonies
9.4 Confirmation
10 Expression of results
10.1 Count of presumptive B. cereus colonies
10.2 No colonies
10.3 Precision
11 Test report
Annex A (normative) Confidence limits for the estimation of
small numbers of colonies
Annex B (informative) Results of interlaboratory test
Bibliography
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