Application of coated hollow fiber protected membrane liquid phase microextraction to the analysis of organophosphorus pesticides
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 phas...
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| Main Authors: | , , , |
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| Format: | Book Section |
| Language: | English |
| Published: |
Penerbit UTM
2008
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/16808/1/M.MarsinSanagi2008_ApplicationofCoatedHollowFiberProtectedMembrane.pdf http://eprints.utm.my/id/eprint/16808/ |
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| Institution: | Universiti Teknologi Malaysia |
| Language: | English |
| Summary: | 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. |
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