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BS EN ISO 6887-1:2017

BS EN ISO 6887-1:2017

$167.15

Microbiology of the food chain. Preparation of test samples, initial suspension and decimal dilutions for microbiological examination – General rules for the preparation of the initial suspension and decimal dilutions

Published By Publication Date Number of Pages
BSI 2017 36
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PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
Endorsement notice
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
11 4 Principle
5 Diluents
5.1 Basic materials
5.2 Diluents for general use
5.2.1 Peptone salt solution
12 5.2.2 Buffered peptone water
5.2.3 Double-strength buffered peptone water
5.3 Diluents for special purposes
5.4 Distribution and sterilization of the diluent
13 5.5 Performance testing for diluents
6 Apparatus
14 7 Sampling
8 Preparation of samples
8.1 General
15 8.2 Frozen products
8.2.1 General
8.2.2 Small samples defrosted before testing
8.2.3 Large pieces or blocks sampled while frozen
16 8.3 Hard and dry products
8.4 Dehydrated and other low-moisture products
8.5 Liquid and non-viscous products
8.6 Acidic products
17 8.7 High-fat (over 20 %) foods
8.8 Multi-component products
8.9 Packaged products
18 8.10 Surface samples (swabs and other devices)
9 Specific procedures
9.1 Test portion and initial suspension (primary dilution)
19 9.2 Duration of the procedure
9.3 Pooling and compositing procedures for qualitative tests
10 Further dilutions
10.1 Decimal dilution series
20 10.2 Other dilution series
21 Annex A (informative) Illustrations of pooling and compositing procedures
26 Annex B (informative) Method for sampling frozen test pieces or blocks
28 Annex C (informative) Data showing reliability of test results according to size of test portions
31 Annex D (informative) Verification protocol for pooling samples for qualitative tests
34 Bibliography

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BS EN ISO 6887-1:2017
$167.15