BIROn - Birkbeck Institutional Research Online

    The ‘Horwitz ratio’—a study of the ratio between reproducibility and repeatability precisions in the analysis of foodstuffs

    Thompson, Michael and Woodgate, R. (2015) The ‘Horwitz ratio’—a study of the ratio between reproducibility and repeatability precisions in the analysis of foodstuffs. Analytical Methods 7 (1), pp. 375-379. ISSN 1759-9660.

    Full text not available from this repository.

    Abstract

    This paper examines precision statistics from collaborative trials (interlaboratory method performance studies) reported between 1990 and 2000. The principal focus is on the ‘Horwitz ratio’ (sR/sr), the ratio of the estimated standard deviations of reproducibility (sR) and repeatability (sr) found for individual analytical procedures. A predictable ratio would be a valuable tool in assessing uncertainty and detection limit. While the median ratio observed was close to 2.0, a significant variation with a strong positive skew was observed, much of which could be attributed to particular types of analyte, test material, and analytical procedure.

    Metadata

    Item Type: Article
    School: Birkbeck Schools and Departments > School of Science > Biological Sciences
    Depositing User: Administrator
    Date Deposited: 20 Jan 2015 13:33
    Last Modified: 20 Jan 2015 13:33
    URI: http://eprints.bbk.ac.uk/id/eprint/11478

    Statistics

    Downloads
    Activity Overview
    0Downloads
    297Hits

    Additional statistics are available via IRStats2.

    Archive Staff Only (login required)

    Edit/View Item Edit/View Item