Resíduos agrotóxicos em lodo de estação de tratamento de água para consumo humano: validação de metodologia analítica utilizando cromatografia líquida acoplada à espectrometria de massas em tandem (LC-MS/MS) / PESTICIDES RESIDUES IN WATER TREATMENT PLANT SLUDGE: VALIDATION OF ANALYTICAL METHODOLOGY USING LIQUID CHROMATOGRAPHY COUPLED TO TANDEM MASS SPECTROMETRY (LC-MS/MS)

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

The evolving scenario of Brazilian agriculture brings benefits to the population and demands technological advances to this field. Constantly, new pesticides are introduced encouraging scientific studies with the aim of determine and evaluate impacts on the population and on environment. In this work, the evaluated sample was the sludge resulted from water treatment plant located in the Vale do Ribeira, São Paulo, Brazil. The technique used was the reversed phase liquid chromatography coupled to electrospray ionization tandem mass spectrometry. Compounds were previously liquid extracted from the matrix. The development of the methodology demanded data processing in order to be transformed into reliable information. The processes involved concepts of validation of chemical analysis. The evaluated parameters were selectivity, linearity, range, sensitivity, accuracy, precision, limit of detection, limit of quantification and robustness. The obtained qualitative and quantitative results were statistically treated and presented. The developed and validated methodology is simple. As results, even exploring the sensitivity of the analytical technique, the work compounds were not detected in the sludge of the WTP. One can explain that these compounds can be present in a very low concentration, can be degraded under the conditions of the water treatment process or are not completely retained by the WTP.

ASSUNTO(S)

lc-ms/ms agrotóxicos lodo de eta validação agrotóxicos validação lodo de eta lc-ms/ms

ACESSO AO ARTIGO

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