NF EN ISO 17994

NF EN ISO 17994

April 2014
Standard Current

Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods

ISO 17994:2014 specifies an evaluation procedure for comparing two methods with established performance characteristics according to ISO/TR 13843 and intended for the quantification of the same target group or species of microorganisms. It provides the mathematical basis for the evaluation of the average relative performance of two quantitative methods against chosen criteria for the comparison. It does not provide data for assessment of the precision of the methods being compared. It is appropriate that the precision of methods is assessed as part of their performance characterization. ISO 17994:2014 does not provide methods for the verification of method performance characterization in a single laboratory.

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Main informations

Collections

National standards and national normative documents

Publication date

April 2014

Number of pages

30 p.

Reference

NF EN ISO 17994

ICS Codes

07.100.20   Microbiology of water
13.060.70   Examination of biological properties of water

Classification index

T90-462

Print number

1

International kinship

ISO 17994:2014

European kinship

EN ISO 17994:2014
Sumary
Water quality - Requirements for the comparison of the relative recovery of microorganisms by two quantitative methods

ISO 17994:2014 specifies an evaluation procedure for comparing two methods with established performance characteristics according to ISO/TR 13843 and intended for the quantification of the same target group or species of microorganisms.

It provides the mathematical basis for the evaluation of the average relative performance of two quantitative methods against chosen criteria for the comparison. It does not provide data for assessment of the precision of the methods being compared. It is appropriate that the precision of methods is assessed as part of their performance characterization.

ISO 17994:2014 does not provide methods for the verification of method performance characterization in a single laboratory.

Replaced standards (1)
NF EN ISO 17994
December 2004
Standard Cancelled
Water quality - Criteria for establishing equivalence between microbiological methods

Le présent document définit une procédure d'évaluation qui permet de comparer deux méthodes visant à détecter ou à quantifier le même groupe cible ou la même espèce de micro-organismes. Deux méthodes quelconques de dénombrement fondées sur des comptages (de colonies ou de tubes positifs) ou deux méthodes quelconques de détection (méthodes présence/absence (P/A)) visant au même objectif peuvent être comparées.

Table of contents
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  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes, définitions et symboles
    1
  • 4 Principe
    3
  • 5 Exigences fondamentales relatives à l'essai comparatif
    4
  • 6 Calculs
    8
  • 7 Évaluation
    9
  • 8 Rapport d'essai
    13
  • Annexe A (informative) Logigramme
    14
  • Annexe B (informative) Essais comparatifs
    15
  • Annexe C (informative) Dérivation de l'équation pour le calcul du nombre d'échantillons
    17
  • Annexe D (informative) Exemple d'une évaluation bilatérale
    19
  • Bibliographie
    22
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