AVALIAÇÃO DE INCERTEZA DE MEDIÇÃO NA DETERMINAÇÃO DE INTERFERENTES ENDÓCRINOS EM ÁGUA SUPERFICIAL POR CROMATOGRAFIA GASOSA COM DETECÇÃO POR ESPECTROMETRIA DE MASSAS

Elaine Arantes Jardim Martins, Hélio Akira Furusawa, Juliana Ikebe Otomo, Renata Rodrigues de Souza, Caroline Lima de Oliveira, Marycel Elena Barboza Cotrim, Maria Aparecida Faustino Pires

Abstract


DOI: 10.14684/intertech.13.2014.277-284

The uncertainty was estimated for the determination of some endocrines disruptors content in superficial water using gas chromatography with mass spectrometry detection. The endocrine disruptors were extracted from superficial water by solid-phase extraction procedures, derivatisation and quantification by GC/MS. In the estimation of uncertainty, sample processing and chromatographic determination that may significantly influence the uncertainty of analytical data were considered. The results show that the method recovery and matrix-matched calibration are the two main contributors to uncertainty. The method has a relative expanded uncertainty (coverage factor k = 2,447 for 6 degrees of freedom at a 95% confidence level) of about 8 to 19% and endocrine disruptors content of approximately 4 ng.mL-1 to 2 μg.mL-1, depending on the compound.

 

 

Index Terms - uncertainty measurement; endocrine disruptors; gas chromatography.


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ISSN 2317-4382

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