Integration of metrological principles and performance evaluation in a proficiency testing scheme in support of the Council Directive 98/83/EC |
| |
Authors: | Andreja Drolc Magda Cotman |
| |
Institution: | (1) National Institute of Chemistry, Hajdrihova 19, P.O.B. 660, 1000 Ljubljana, Slovenia |
| |
Abstract: | Proficiency testing as a means of external quality assessment plays the role of independent evidence of laboratories’ performance.
To enable laboratories to fulfil the requirements stated in legislation, methodology for evaluation of laboratories’ performance
in proficiency testing schemes should incorporate principles of measurement results which are fit for intended use and incorporate
evaluation of laboratories’ performances based on independent reference value. A proficiency testing scheme was designed to
support Drinking Water Directive (98/83/EC) specifically. The methodology for performance evaluation, which takes into account
a “fitness for purpose”-based standard deviation for proficiency assessment, is proposed and discussed in terms of requirements
of the Drinking Water Directive. A ζ′-score, modified by application of target uncertainty was developed in a way that fulfils requirements defined in the legislation.
As an illustration, results are reported for nitrate concentration in water. The approach presented can also be applied to
other fields of measurements. |
| |
Keywords: | Proficiency testing Directive 98/83/EC Fitness for purpose Target measurement uncertainty Measurement traceability |
本文献已被 SpringerLink 等数据库收录! |
|