NF EN ISO 21187

NF EN ISO 21187

March 2021
Standard Current

Milk - Quantitative determination of microbiological quality - Guidance for establishing and verifying a conversion relationship between results of an alternative method and anchor method results

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.

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Main informations

Collections

National standards and national normative documents

Publication date

March 2021

Number of pages

31 p.

Reference

NF EN ISO 21187

ICS Codes

07.100.30   Food microbiology
67.100.01   Milk and milk products in general

Classification index

V04-055

Print number

1

International kinship

ISO 21187:2021

European kinship

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

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.

Replaced standards (1)
NF EN ISO 21187
January 2006
Standard Cancelled
Milk - Quantitative determination of bacteriological quality - Guidance for establishing and verifying a conversion relationship between routine method results and anchor method results

Le présent document a pour principal objectif de donner des lignes directrices pour l'établissement d'une relation de conversion entre les résultats d'une méthode de routine et une méthode d'ancrage et sa vérification en vue de la mesure de la qualité bactériologique du lait. La conversion en microbiologie quantitative signifie l'expression, en unités d'une autre méthode, généralement une méthode de référence ou d'ancrage, du résultat d'une mesure quantitative de l'état bactériologique d'un échantillon pour essai obtenu en appliquant une méthode de routine. De ce fait, les résultats quantitatifs obtenus selon les méthodes de routine peuvent être comparés aux valeurs ou aux limites présentées dans les unités de la méthode de référence ou d'ancrage.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principes
  • 5 Prise en compte des facteurs influençant la relation de conversion
  • 6 Échantillons pour essai
  • 7 Analyse
  • 8 Établissement d'une relation de conversion
  • 9 Vérification d'une relation de conversion
  • 10 Rapport d'essai
  • Annexe A (informative) Nombre d'échantillons pour essai dans une régression linéaire
  • Annexe B (informative) Exemple d'identification des valeurs aberrantes et de calcul de la relation de conversion
  • Annexe C (informative) Exemple - Calcul de la signification (vérification de la relation de conversion)
  • Bibliographie
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