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Application of coated hollow fiber protected membrane liquid phase microextraction to the analysis of organophosphorus pesticides

Roharjo, Yanuardi and Sanagi, M. Marsin and Wan Ibrahim, Wan Aini and Abu Naim, Ahmedy (2008) Application of coated hollow fiber protected membrane liquid phase microextraction to the analysis of organophosphorus pesticides. In: Advances In Fundamentals And Social Sciences. Penerbit UTM , Johor, pp. 40-49. ISBN 978-983-52-0609-2

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Abstract

This paper evaluates a m ethod for determ ining the organophosphorus pesticides (m ethidation, quinalphos and profenofos) in aqueous sam ple using coated hollow fiber protected liquid phase m icroextraction syst em (CHF-LPME) coupled with reversed phase high perform ance liquid chrom atography (RP- HPLC) with UV-Vis detection. Po lypropylene fiber coated with polydim ethylsiloxane (PDMS) wa s developed using the sol- gel technology. The physical characteri stics of the coated fiber was exam ined by Fourier transfor m infr ared (FTIR) a nd field em ission- scanning electron m icroscopy (FE -SEM) equipped with energy dispersive x-ray (EDX). In the pr econcentration step, the accepto r phase (4 µL) introduced into the hollow fiber (1.5 c m) was used to extract organophophorus pesticides fr om aqueous sam ple (11 m L). The lim it of detection (LOD) obtained varied from 16.9 to 0.65 µg L -1 . The proposed m ethod provided good enrichm ent factors of up to 219, with reproducibility rang ing from 0.39 to 2.92%, and recoveries of over 75%. This method was applied successfully to the determination of organophosphor us pesticides in selected drinking water samples.

Item Type:Book Section
Subjects:Q Science
Divisions:Science
ID Code:16808
Deposited By: Mrs Liza Porijo
Deposited On:28 Oct 2011 04:58
Last Modified:15 Aug 2017 01:53

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