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.
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 Faculties and Schools > Faculty of Science > School of Natural Sciences |
| Depositing User: | Administrator |
| Date Deposited: | 20 Jan 2015 13:33 |
| Last Modified: | 02 Aug 2023 17:14 |
| URI: | https://eprints.bbk.ac.uk/id/eprint/11478 |
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