Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.aca.2007.10.006
Title: Determination of organophosphorous pesticides in wastewater samples using binary-solvent liquid-phase microextraction and solid-phase microextraction: A comparative study
Authors: Basheer, C. 
Alnedhary, A.A.
Rao, B.S.M.
Lee, H.K. 
Keywords: Binary solvent
Environmental analysis
Liquid-phase microextraction
Organophosphorous pesticides
Solid-phase microextraction
Issue Date: 19-Dec-2007
Citation: Basheer, C., Alnedhary, A.A., Rao, B.S.M., Lee, H.K. (2007-12-19). Determination of organophosphorous pesticides in wastewater samples using binary-solvent liquid-phase microextraction and solid-phase microextraction: A comparative study. Analytica Chimica Acta 605 (2) : 147-152. ScholarBank@NUS Repository. https://doi.org/10.1016/j.aca.2007.10.006
Abstract: A simple and efficient binary solvent-based two-phase hollow fiber membrane (HFM)-protected liquid-phase microextraction (BN-LPME) technique for moderately polar compounds was developed. Six organophosphorous pesticides (OPPs) (triethylphosphorothioate, thionazin, sulfotep, phorate, disulfoton, methyl parathion and ethyl parathion) were used as model compounds and extracted from 10-mL wastewater with a binary-solvent (toluene:hexane, 1:1) mixture. Some important extraction parameters, such as extraction time, effect of salt, sample pH and solvent ratio composition were optimized. BN-LPME combined with gas chromatography/mass spectrometric (GC/MS) analysis provided repeatability (R.S.D.s ≤ 12%, n = 4), and linearity (r ≤ 0.994) and solid-phase microextraction provides comparable of R.S.D.s ≤ 13%, n = 4 and linearity (r = ≤0.966) for spiked water samples. The limits of detection (LODs) were in the range of 0.3-11.4 ng L-1 for BN-LPME and 3.1-120.5 ng L-1 for SPME at (S/N = 3) under GC/MS selective ion monitoring mode. In addition to high enrichment, BN-LPME also served as a sample cleanup procedure, with the HFM act as a filtering medium to prevent large particles and extraneous materials from being extracted. To investigate and compare their applicability, the BN-LPME and SPME procedures were applied to the detection of OPPs in domestic wastewater samples. © 2007 Elsevier B.V. All rights reserved.
Source Title: Analytica Chimica Acta
URI: http://scholarbank.nus.edu.sg/handle/10635/93557
ISSN: 00032670
DOI: 10.1016/j.aca.2007.10.006
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