期刊
ANALYTICA CHIMICA ACTA
卷 761, 期 -, 页码 117-127出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.aca.2012.11.032
关键词
Surface water; Waste water; Pesticides; Organic pollutants; LC-MS/MS; LC-QTOF MS
资金
- Spanish Ministry of Economy and Competitiviness [CSD2009]
- European Regional Development Funds (ERDF) [CGL2011-29703-C02-02]
As a suitable way for routine screening of pesticides and control of other organic contaminants in water, the combination of liquid chromatography triple quadrupole tandem mass spectrometry (LC-QqQ-MS/MS) and liquid chromatography-hybrid quadrupole time-of-flight mass spectrometry (LC-QTOF-MS) has been applied to the analysis of 63 surface and waste water samples after conventional solid-phase extraction (SPE). The extracts were screened for 43 pesticides or degradation products by LC-QqQ-MS/MS achieving limits of detection CLOD) ranged from 0.04 to 2 ng L-1. Of the 43 selected pesticides, 33 were detected in water samples. The ESI-QTOF MS instrument was run using two simultaneous acquisition functions with low and high collision energy (MSE approach) and acquiring the full mass spectra. A home-made database containing more than 1100 organic pollutants was used for substance identification. Around 250 of these compounds were available at the laboratory as reference standards. Five pesticides and 3 of their degradation products, different to those selected in the QqQ method, were detected by QqTOF-MS. Thirteen pharmaceuticals and two drugs of abuse were also identified in the samples. In practice, the sample preparation proved to be suitable for both techniques and for a wide variety of substances with different polarity. Mutual confirmation and evidence of co-occurrence of several other organic contaminants were the main advantages of the combination of both techniques. (C) 2012 Elsevier B.V. All rights reserved.
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