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EN ISO 21187:2005

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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

Published date

19-10-2005

Superseded date

19-03-2021

Superseded by

EN ISO 21187:2021

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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principles
  4.1 Prerequisites
  4.2 Organizational set-up
5 Establishing a conversion relationship
  5.1 Consideration of influencing factors
      and their consequences
  5.2 Test samples
  5.3 Pretreatment of test samples
  5.4 Analysis
  5.5 Calculation
  5.6 Expression of results
6 Verification of a conversion relationship
  6.1 Frequency of verification
  6.2 Test samples
  6.3 Pretreatment of test samples
  6.4 Analysis
  6.5 Calculation and verification of a
      conversion relationship
7 Test report
Annex A (informative) Number of samples for
                      linear regression
Bibliography

ISO 21187|IDF 196:2004 gives guidelines for the establishment of a conversion relationship between the results of a routine method and an anchor method, and its verification for the quantitative determination of the bacteriological quality of milk.

Committee
CEN/TC 302
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Superseded
SupersededBy

ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
ISO 11095:1996 Linear calibration using reference materials
ISO 16140:2003 Microbiology of food and animal feeding stuffs — Protocol for the validation of alternative methods
ISO 8196-2:2009 Milk — Definition and evaluation of the overall accuracy of alternative methods of milk analysis — Part 2: Calibration and quality control in the dairy laboratory
ISO 8196-1:2009 Milk — Definition and evaluation of the overall accuracy of alternative methods of milk analysis — Part 1: Analytical attributes of alternative methods
ISO 3534-1:2006 Statistics — Vocabulary and symbols — Part 1: General statistical terms and terms used in probability

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