AVALIA??O DA EXATID?O E DA PRECIS?O DE MéTODOS DE ANáLISE DE RESíDUOS DE PESTICIDAS MEDIANTE ENSAIOS DE RECUPERA??O

摘要

Discute-se a importancia da exatid?o e da precis?o navalida??o de métodos de análise de resíduos de pesticidas.S?o apresentados, mediante dois estudos de casos, osprincipais processos para a avalia??o da exatid?o. Nos casosrelatados foram obtidas recupera??es entre 80 e 104% ecoeficiente de varia??o entre 2,81 e 12,74%, ambosenquadrados na faixa recomendada pela Association ofOfficial Analytical Chemists (AOAC) para os níveis deconcentra??o investigados. Os estudos evidenciaram que,os ensaios de recupera??o s?o adequados para a avalia??odos critérios de exatid?o e precis?o para as mesmasmatrizes. EVALUATION OF METHODS ACCURACY AND PRECISION FOR ANALYSIS OFPESTICIDES RESIDUES THROUGH RECUPERATION ASSAYS Abstract The importance of accuracy and precision in the methods validation of pesticides residuesanalysis is discussed. The main processes for accuracy evaluation are presentedthrough two case studies. In the cited cases, recoveries were obtained between 80 and104% and variation coefficient between 2,81 and 12,74% both in the range recommendedby AOAC for the concentration levels investigated. The studies evidenced that therecovery assays were adequate for the evaluation of the accuracy and precisioncriteria for the same matrix.