Journal article
The application of data from proficiency testing to laboratory accreditation according to ISO 17025
In
Accreditation and Quality Assurance
—
2008, Volume 13, Issue 12, pp. 703-709
Abstract
Current methods of testing laboratories for their proficiency in reporting correct measurement results are liable to substantial errors of the 2nd kind. This means that laboratories with deflated uncertainties are accepted as proficient, even though their reported measurement results pave the way for erroneous conclusions.
Only by using En numbers based on an accepted reference value with the lowest possible uncertainty can the risk of recognizing incorrect measurement results be kept at an acceptable level. Based on an actual set of PT-data for the concentration of Pb in water the paper compares proficiency test results obtained by methods using En numbers with methods based on z-scores.
| Language: | English |
|---|---|
| Publisher: | Springer-Verlag |
| Year: | 2008 |
| Pages: | 703-709 |
| Journal subtitle: | Journal for Quality, Comparability and Reliability in Chemical Measurement |
| ISSN: | 14320517 and 09491775 |
| Types: | Journal article |
| DOI: | 10.1007/s00769-008-0435-1 |
