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KMID : 1059520120560050583
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Journal of the Korean Chemical Society
2012 Volume.56 No. 5 p.583 ~ p.590
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Simultaneous Analysis of Pesticides in Aqueous Sample by HF-LPME
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Nam Jang-Woo
Lee Kang-Jin
Myung Seung-Woon
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Abstract
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The HF (Hollow fiber) extraction method was optimized to analysis seven species of pesticides in aqueous sample and analyzing samples by GC/MS. Hollow fiber extraction showed good efficiency when it was conducted under these conditions: organic solvent was toluene and agitation speed was 1200 rpm. The 15% concentration of NaCl was optimized when it was experimented between 5% and 25%. The equilibrium time was determined at 15 minutes. The pH 5 showed the best effect on the extraction efficiency. The linearities of calibration curves of seven species were good with correlation of regression (r2) over 0.995 when they were experimented over a concentration range of 5 μg/L to 50 μg/L. The analytical data exhibited the detection of limits (LODs) range of 0.37 μg/L to 1.23 μg/L and the limit of quantification (LOQs) range of 1.19 μg/L to 3.91 μg/L. The optimized HF-LPME extraction method provides a simple and effective preparation and requires small amount of organic solvents and samples compared to conventional pre-treatment methods.
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KEYWORD
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Pesticides, HF-LPME, GC/MS
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