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BS EN ISO 22117:2019

BS EN ISO 22117:2019

$167.15

Microbiology of the food chain. Specific requirements and guidance for proficiency testing by interlaboratory comparison

Published By Publication Date Number of Pages
BSI 2019 42
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This document specifies requirements and gives guidelines for the organization of proficiency testing (PT) schemes for microbiological examinations of

  1. foods and beverages,

  2. feeding animals,

  3. environmental samples from food and feed production and handling, and

  4. primary production stages.

This document is also applicable to the microbiological examination of water where water is either used in food production or is regarded as a food in national legislation.

This document relates to the technical organization and implementation of PT schemes, as well as the statistical treatment of results of microbiological examinations.

This document is designed for use with ISO/IEC 17043 and ISO 13528, and deals only with areas where specific or additional details are necessary for PT schemes dealing with microbiological examinations for the areas specified in the first paragraph.

PDF Catalog

PDF Pages PDF Title
2 National foreword
4 European foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
10 4 Scheme design and purpose
4.1 General
4.2 Scheme objectives
11 4.3 Laboratory requirements for schemes
4.4 Choice of test matrices
4.5 Information on test methods used by the PT provider
4.6 Statistical design
12 5 Technical requirements and guidance for sample design and content
5.1 Sources, characterization and traceability of organisms
5.2 Target organisms level
13 5.3 Non-target organisms and interferences
5.4 Matrix selection and effects
14 6 Sample verification by the provider
6.1 General
6.2 Sample homogeneity testing — General considerations
6.3 Homogeneity testing for quantitative (enumeration) samples
15 6.4 Homogeneity testing for qualitative methods
16 6.5 Stability testing by the provider
6.5.1 General
6.5.2 Stability during storage conditions
6.5.3 Stability during transport conditions
17 7 Sample handling
7.1 General
7.2 Instructions to participants
8 Performance evaluations
8.1 General
8.2 Preliminary considerations
18 8.3 ​Assessment of quantitative methods
8.3.1 General
19 8.3.2 Distribution of data
20 8.3.3 Determining the assigned value
8.3.4 Uncertainty of the assigned value
8.3.5 Methods of assessing performance
8.3.6 Using z-scores
22 8.3.7 Other methods of performance evaluation
24 8.3.8 Long-term performance assessment
25 8.4 ​Assessment of qualitative methods
8.4.1 General
8.4.2 Performance of individual laboratories
27 8.4.3 Scheme comparisons of laboratory performance
29 Annex A (informative) Example of details to be included in a PT scheme plan
31 Annex B (informative) Preparation of fungal spore suspensions
32 Annex C (informative) Methods of testing for variation between portions of test materials
36 Annex D (informative) Example of a safety data sheet
38 Annex E (informative) A practical method to assess long-term performance of participants in PT schemes using enumeration methods
40 Bibliography

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BS EN ISO 22117:2019
$167.15