Sanagi, Mohd Marsin and See, Hong Heng and Wan Ibrahim, Wan Aini and Naim, A. Abu (2006) Determination of pesticides in water by cone-shaped membrane protected liquid phase microextraction prior to micro-liquid chromatography. Journal of Chromatography A, 1152 . pp. 215-219. ISSN 0021-9673
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Official URL: http://dx.doi.org/10.1016/j.chroma.2006.11.096
New sample pre-treatment technique termed cone-shaped membrane liquid phase microextraction (CSM-LPME) was developed and combined with micro-liquid chromatography (micro-LC) for the determination of selected pesticides in water samples. Four pesticides (hexaconazole, procymidone, quinalphos and vinclozolin) were considered as target analytes. Several important extraction parameters such as types of extraction solvent, agitation rate, pH value, total exposure time and effect of salt and humic acids were optimized. Enrichment factors of >50 folds were easily achieved within 20 min of extraction. The analytical data demonstrated relative standard deviations for the reproducibility of the optimized CSM-LPME method ranging from 6.3 to 7.5%. The correlation coefficients of the calibration curves were at least 0.9995 across a concentration range of 2â€“100 g/L. The detection limits for all the analytes were found to be in the range of 1.1â€“1.9 g/L.
|Uncontrolled Keywords:||Membrane extraction; Liquid phase microextraction; Micro-liquid chromatography|
|Subjects:||Q Science > Q Science (General)|
|Deposited By:||Haslinda Sabari|
|Deposited On:||13 Nov 2008 04:11|
|Last Modified:||13 Nov 2008 04:11|
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