Jump to main content
Jump to site search

Issue 23, 2015
Previous Article Next Article

Assessing the stability of a proficiency test material by participant-blind re-use after a period of storage

Author affiliations

Abstract

A new, powerful and inexpensive test for the stability of reference materials characterised by the results of proficiency tests is demonstrated. Participant-blind re-issue of the same materials provides the scheme organiser with two independent estimates of the location and variance of the results. Because many participant laboratories are involved, the location estimates will not be confounded with changes in the execution of analytical procedures. The method is illustrated by its application to foodstuff test materials almost certain to be stable, with periods between the re-issues of between seven and 52 months. Apart from one discrepant result (out of 41), no statistically significant instability was demonstrated.

Graphical abstract: Assessing the stability of a proficiency test material by participant-blind re-use after a period of storage

Back to tab navigation

Publication details

The article was received on 26 ágú. 2015, accepted on 22 okt. 2015 and first published on 26 okt. 2015


Article type: Paper
DOI: 10.1039/C5AY02255J
Author version available: Download Author version (PDF)
Citation: Anal. Methods, 2015,7, 9753-9755
  •   Request permissions

    Assessing the stability of a proficiency test material by participant-blind re-use after a period of storage

    M. Sykes and M. Thompson, Anal. Methods, 2015, 7, 9753
    DOI: 10.1039/C5AY02255J

Search articles by author

Spotlight

Advertisements