Journal
TALANTA
Volume 100, Issue -, Pages 246-253Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2012.04.039
Keywords
Pyrethroids; GC/MS; HF-LPME; Water samples
Categories
Funding
- Bizkaia Council
- Basque Country Government [DIPE07/17, SAIOTEK S-PE09UN44, IT47-10]
- University of Basque Country
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A simple, easy-to-use, efficient and environmentally friendly method has been developed for the simultaneous analysis of nine pirethroid pesticides in water samples by the combination of hollow fibre-based liquid-phase microextraction (HF-LPME) and gas chromatography-mass spectrometry (GC/MS). For the developed method, nine pirethroid pesticides (esbiothrin, prallethrin, bifenthrin, tetramethrin, phenothrin, permethrin, cyfluthrin, cypermethrin and deltamethrin) were concentrated and well separated under optimal conditions. Several factors that influence the efficiency of HF-LPME were investigated and optimized by means of experimental design. The proposed method has good linearity in the concentration range of 10-400 mu g L-1 with correlation coefficients between 0.995 and 0.999. Overall enrichment factors for the optimized method ranged from 139 to 255 times except for cypermethrin and deltamethrin which ranged from 35 to 128. Detection and quantitation limits of the chromatographic method were in the range of 0.002-0.012 mu g L-1 and 0.003-0.026 mu g L-1 respectively, with RSD values between 4.2% and 18.4%. The recoveries varied in the range of 69.4%-122.7% except for cypermethrin and deltamethrin (17.5%-64.1%) with relative standard deviations between 1.0% and 24.0% for intra and inter-day experiments at different concentrations (0.1 mu g L-1, 0.5 mu g L-1, 1 mu g L-1). The HF-LPME method optimized was applied to the analysis of three spiked real water samples with good results. (C) 2012 Elsevier B.V. All rights reserved.
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