This document specifies requirements and gives guidelines for the organization of proficiency testing (PT) schemes for microbiological examinations of a) foods and beverages, b) feeding animals, c) environmental samples from food and feed production and handling, and d) 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.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Scheme design and purpose
4.1 General
4.2 Scheme objectives
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
5 Technical requirements and guidance for sample design and content
5.1 Sources, characterization and traceability of organisms
5.2 Target organisms level
5.3 Non-target organisms and interferences
5.4 Matrix selection and effects
6 Sample verification by the provider
6.1 General
6.2 Sample homogeneity testing — General considerations
6.3 Homogeneity testing for quantitative (enumeration) samples
6.4 Homogeneity testing for qualitative methods
6.5 Stability testing by the provider
7 Sample handling
7.1 General
7.2 Instructions to participants
8 Performance evaluations
8.1 General
8.2 Preliminary considerations
8.3 Assessment of quantitative methods
8.4 Assessment of qualitative methods
Annex A Example of details to be included in a PT scheme plan (informative)
Annex B Preparation of fungal spore suspensions (informative)
Annex C Methods of testing for variation between portions of test materials (informative)
Annex D Example of a safety data sheet (informative)
Annex E A practical method to assess long-term performance of participants in PT schemes using enumeration methods (informative)
ISO 13528:2015 Statistical methods for use in proficiency testing by interlaboratory comparison
ISO 3534-1:2006 Statistics -- Vocabulary and symbols -- Part 1: General statistical terms and terms used in probability
ISO 3534-2:2006 Statistics -- Vocabulary and symbols -- Part 2: Applied statistics
ISO 13528:2015 Statistical methods for use in proficiency testing by interlaboratory comparison
ISO 3534-1:2006 Statistics -- Vocabulary and symbols -- Part 1: General statistical terms and terms used in probability
ISO 3534-2:2006 Statistics -- Vocabulary and symbols -- Part 2: Applied statistics
ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results -- Part 1: General principles and definitions
ISO/IEC 17043:2010