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標題: Electrically assisted solid-phase microextraction combined with liquid chromatography mass spectrometry for determination of parathion in water
作者: Yang, T.J.
Lee, M.R.
關鍵字: Electrically assisted solid-phase microextraction;Parathion;Liquid;chromatography-mass spectrometry;electrochemical stripping analysis;flame photometric detection;organophosphorus pesticides;gas-chromatography;pencil lead;degradation-products;methyl-parathion;extraction;samples;polypyrrole
Project: Talanta
期刊/報告no:: Talanta, Volume 82, Issue 2, Page(s) 766-770.
A novel method for electrically assisted microextraction coupled to liquid chromatography-mass spectrometry was evaluated for determination of trace levels of parathion in water. A pencil lead electrode was used in a di-electrode system to extract parathion onto the electrode surface with a reductive potential applied. The optimum extraction conditions were found to be a potential of -600 mV for 60 s in pH 2 phosphate buffer solution. The parathion was desorbed statically for 1 min and dynamically for 3 min in the commercial SPME-HPLC desorption chamber, then analyzed with LC-APCI-MS/MS. The detection limit (LOD) for parathion in water was found to be 0.3 ng/mL. The proposed technique was demonstrated to be fast, sensitive and not require a solvent sample pretreatment. (C) 2010 Elsevier B.V. All rights reserved.
ISSN: 0039-9140
DOI: 10.1016/j.talanta.2010.05.053
Appears in Collections:化學系所

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