期刊
TALANTA
卷 85, 期 2, 页码 975-982出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2011.05.012
关键词
Multiresidue; Waters; Metabolites; Pesticides; Liquid chromatography
资金
- FEDER
- European Social Funds
- Ministerio de Espana de Ciencia e Innovacion through the Ramon and Cajal Subprogram [AGL2010-20458-C02-01]
In this work, a rapid and sensitive analytical multiresidue method has been developed for the simultaneous determination of 48 pesticides and 19 metabolites in waters (tap, leaching and sewage), using liquid chromatography-tandem mass spectrometry (LC-MS/MS) with triple quadrupole in selected reaction monitoring (SRM) mode. The procedure involves initial single phase extraction of samples with acetonitrile by sonication, followed by liquid-liquid partition aided by salting out process using NaCl. Matrix influence on recoveries was evaluated for the three waters. More than 50% of the compound presented very low signal suppression. The method presents good linearity over the range assayed 10-500 mu g L(-1) and the most frequent detection limits was 0.05 ng mL(-1). The average recovery by the LC-MS/MS method obtained for these compounds varied from 74.6 to 111.2% with a relative standard deviation between 2.5 and 8.9%. The proposed method was used to determine pesticides levels in leaching water samples from 5 lysimeters from an experimental greenhouse located in Murcia. (C) 2011 Elsevier B.V. All rights reserved.
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