Precision estimates produced by specially-designed ruggedness tests compared with those derived from collaborative trials, in relation to estimation of measurement uncertainty
Thompson, Michael; Guffogg, Stephen; Stangroom, Stephen; Osborne, Paula; Key, Pauline; Wood, Roger; Thompson Michael; School of Biological and Chemical Sciences, Birkbeck College (University of London); Guffogg Stephen; Lincolne Sutton and Wood Ltd; Stangroom Stephen; Lincolne Sutton and Wood Ltd; Osborne Paula; Lincolne Sutton and Wood Ltd; Key Pauline; Institute of Food Research; Wood Roger; Food Standards Agency, c/o Institute of Food Research
Журнал:
Analyst
Дата:
2002
Аннотация:
We have compared the reproducibility precisions provided by collaborative trials with precisions obtained from ruggedness tests specially designed to try to simulate between-laboratory variation. We found that the ruggedness tests underestimated the reproducibility variability consistently for those analytical methods requiring empirical calibration. The ruggedness tests provided on average a precision merely comparable with repeatability precision. This finding has implications for the estimation of uncertainty.
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