期刊
ANALYTICA CHIMICA ACTA
卷 513, 期 2, 页码 445-449出版社
ELSEVIER
DOI: 10.1016/j.aca.2004.03.020
关键词
polypyrrole; on-line trace enrichment; solid-phase extraction; liquid chromatography; phenols
A pyrrole-based conductive polymer was prepared and applied as new sorbent for on-line solid-phase extraction (SPE) of phenol and chlorophenols from water samples. Polypyrrole (PPy) was synthesized by chemical oxidation of the monomer in non-aqueous solution. The efficiency of this polymer for extraction of phenol and chlorophenols was evaluated using 35 mg of PPy as the sorbent in an on-line SPE system coupled to reversed-phase liquid chromatography with UV detection. The mobile phase were mixture of phosphate buffer-acetonitrile and compounds were eluted by the mobile phase using a six-port switching valve. High volumes of water, up to 160 ml, could be preconcentrated without the loss of phenols, except for the more polar ones. The R.S.D. for a river water sample spiked with phenol and chlorophenols at sub-ppb level was lower than 7% (n = 5) and detection limits of 15-100 and 35-150 ng 1(-1) for tap and river water were obtained, respectively. (C) 2004 Elsevier B.V. All rights reserved.
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