期刊
TALANTA
卷 75, 期 1, 页码 70-75出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.talanta.2007.10.036
关键词
anilines; dispersive liquid-liquid microextraction; gas chromatography-mass spectrometry
The one-step derivarization and extraction technique for the determination of anilines in river water by dispersive liquid-liquid microextraction (DLLME) is presented. In this method the anifines are extracted by DLLME and derivatized with pentafluorobenzaldehyde (PFBAY) in aqueous solution simultaneously. In this derivatization/extraction method, 0.5 ml acetone (disperser solvent) containing 10 mu l chlorobenzene (extraction solvent) and 30 g/l pentafluorobenzaldehyde (PFBAY) dissolved in methanol was rapidly injected by syringe into 5 ml aqueous sample (pH 4.6). Within 20 min the analytes extracted and derivatized were almost finished. After centrifugation, 2 mu l sedimented phase containing enriched analytes was determined by GC-MS. The effects of extraction and disperser solvent type and their volume, pH value of sample solution, derivatization and extraction time, derivatization and extraction temperature were investigated. Linearity in this developed method was ranging from 0.25 to 70 mu g/l, and the correlation coefficients (R-2) were between 0.9955 and 0.9989, and reasonable reproducibility ranging from 5.8 to 11.8% (n = 5). Method detection limits (MDLs) ranged from 0.04 to 0.09 mu g/l (n = 5). (C) 2007 Elsevier B.V. All rights reserved.
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