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    The GeoPT proficiency testing scheme for laboratories routinely analysing silicate rocks: a review of the operating protocol and proposals for its modification

    Thompson, Michael and Webb, P.C. and Potts, P.J. (2015) The GeoPT proficiency testing scheme for laboratories routinely analysing silicate rocks: a review of the operating protocol and proposals for its modification. Geostandards and Geoanalytical Research 39 (4), pp. 433-442. ISSN 1639-4488.

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    Abstract

    The GeoPT proficiency testing programme for geochemical laboratories has been operating for nearly 20 years. This review, based on an analysis of accumulated data and extensive experience, examines whether the protocol followed during this period continues to be appropriate. Possible changes that might be considered for future implementation are examined, in particular the procedures for calculating assigned values, target values, z-scores, and the applicability of dual fitness for purpose criteria. We conclude that the existing protocol remains largely appropriate and effective, but propose that a single fitness-for-purpose criterion be adopted, with an option for laboratories to recalculate their z-scores if the criterion is inappropriate for their requirements.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): Proficiency testing, GeoPT, laboratory performance, quality assurance, review, z scores, silicate rock analysis
    School: School of Science > Biological Sciences
    Depositing User: Administrator
    Date Deposited: 15 Dec 2014 15:42
    Last Modified: 14 Mar 2016 14:53
    URI: https://eprints.bbk.ac.uk/id/eprint/11302

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