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|Title:||Determination of organochlorine pesticides in seawater using liquid-phase hollow fibre membrane microextraction and gas chromatography-mass spectrometry|
|Authors:||Basheer, C. |
|Source:||Basheer, C., Lee, H.K., Obbard, J.P. (2002-08-30). Determination of organochlorine pesticides in seawater using liquid-phase hollow fibre membrane microextraction and gas chromatography-mass spectrometry. Journal of Chromatography A 968 (1-2) : 191-199. ScholarBank@NUS Repository. https://doi.org/10.1016/S0021-9673(02)00793-8|
|Abstract:||The use of hollow fibre membrane microextraction in analytical chemistry has been increasing as the technique is a simple and efficient method for the extraction of trace organic compounds from environmental matrices. A simple liquid-phase microextraction technique using a hollow fibre membrane in conjunction with gas chromatography-mass spectrometry has been developed for the extraction and analysis of organochlorine pesticides (OCPs), i.e. α-hexachlorocyclohexane (BHC), lindane, β-BHC, heptachlor, aldrin, dieldrin, endrin, endosulfan, p,p′-DDD, p,p′-DDT, endrin aldehyde and methoxychlor, from seawater. The technique requires minimal sample preparation time and solvent consumption, and represents a significant advantage over conventional analytical methods. Optimum extraction conditions have been evaluated with respect to sample pH, salt content and stirring rate, as well as solvent type and extraction time. A high level of detection linearity (coefficient of >0.9995, less than 14% RSD) was obtained for OCPs over a range of analyte concentrations between 5 and 100 μg l-1, with detection limits in the parts per trillion (ppt) to sub-parts per billion range. Comparison between liquid-phase microextraction with hollow fibre membrane and US Environmental Protection Agency Method 508 showed that the novel method has comparable detection limits of between 0.013 and 0.059 μg l-1 in seawater. © 2002 Elsevier Science B.V. All rights reserved.|
|Source Title:||Journal of Chromatography A|
|Appears in Collections:||Staff Publications|
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