期刊
ANALYTICA CHIMICA ACTA
卷 687, 期 1, 页码 61-66出版社
ELSEVIER
DOI: 10.1016/j.aca.2010.12.012
关键词
Extraction; Sulfamethoxazole; Aqueous two-phase systems; Poly(propylene glycol); Water samples
资金
- National Natural Science Foundation of China [20777029, 20976074]
- Foundation of Ministry of Education of China [200807100004]
Based on the poly( propylene glycol)(400)(PPG(400))-salt aqueous two-phase system (ATPS), a green, economical and effective sample pretreatment technique coupled with high performance liquid chromatography was proposed for the separation and determination of sulfamethoxazole (SMX). The extraction yield of SMX in PPG(400)-salt ATPS is influenced by various factors, including the salt species, the amount of salt, pH, and the temperature. Under the optimum conditions, most of SMX was partitioning into the polymer-rich phase with the average extraction efficiency of 99.2%, which may be attributed to the hydrophobic interaction and salting-out effect. This extraction technique has been successfully applied to the analysis of SMX in real water samples with the recoveries of 96.0-100.6%, the detection limits of 0.1 mu g L-1, and the linear ranges of 2.5-250.0 mu g L-1. (C) 2010 Published by Elsevier B.V.
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