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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.
|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.||摘要:||
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.
|Appears in Collections:||化學系所|
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