Title: Monitoring organophosphorus pesticides and their degradation products formed by Fenton's reagent using solid-phase extraction–gas chromatography–mass spectrometry

Authors: Sanjeev Mishra, Kishan Reddy-Noone, Archana Jain, Krishna K. Verma

Addresses: Department of Chemistry, Rani Durgavati University, Jabalpur 482001, Madhya Pradesh, India. ' Department of Chemistry, Rani Durgavati University, Jabalpur 482001, Madhya Pradesh, India. ' Department of Chemistry, Rani Durgavati University, Jabalpur 482001, Madhya Pradesh, India. ' Department of Chemistry, Rani Durgavati University, Jabalpur 482001, Madhya Pradesh, India

Abstract: Styrene-divinylbenzene co-polymer (PLRP-S) has been found to be a suitable sorbent for the extraction of organophosphorus pesticides (OPPs) and their decomposition products formed by reaction with the Fenton reagent. The preconcentrated analytes have been eluted with ethyl acetate and analysed by GC-MS. A linear calibration graph was obtained for 0.5–40 µg L^-1 of OPPs using 60 ml of sample volume. The limit of detection varied between 13 ng L^-1 and 62 ng L^-1 for different OPPs when 160 mL sample volume spiked at 0.1 µg L^-1 analytes was analysed. Most OPPs were found to degrade to about 1% within 15 minutes; oxon derivatives were found as the first degradation products.

Keywords: organophosphorus pesticides; GC-MS; ethylene divinylbenzene co-polymers; Fenton reagents; solid phase extraction; styrene divinylbenzene co-polymers; PLRP-S; degradation; water treatment; water pollution.

DOI: 10.1504/IJEP.2006.010453

International Journal of Environment and Pollution, 2006 Vol.27 No.1/2/3, pp.49 - 63

Published online: 24 Jul 2006 *

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