ISO 21187:2021 PDF

Scope: This document gives guidelines for the establishment of a conversion relationship between the results of an alternative method and an anchor method, and its verification for the quantitative determination of the microbiological quality of milk. NOTE The conversion relationship can be used a) to convert results from an alternative method to the anchor basis or b) to convert results/limits, expressed on an anchor basis, to results in units of an alternative method.

ISO 21187:2021 Referenced Document

ISO 16140-1 Microbiology of the food chain - Method validation - Part 1: Vocabulary
ISO 8196-1 Definition and evaluation of the overall accuracy of mutation methods for cow milk analysis Part 1: Analytical characteristics of mutation methods*， 2024-04-20 Update
ISO 8196-2 Definition and evaluation of the overall accuracy of variation methods for cow milk analysis Part 2: Calibration and quality control of dairy laboratories*， 2024-04-20 Update

2021 ISO 21187:2021 Milk - Quantitative determination of microbiological quality - Guidance for establishing and verifying a conversion relationship between results of an alternative method and anchor method results
2004 ISO 21187:2004 Milk - Quantitative determination of bacteriological quality - Guidance for establishing and verifying a conversion relationship between routine method results and anchor method results