期刊
ELECTROANALYSIS
卷 22, 期 9, 页码 1012-1018出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.200900482
关键词
Surfactants; Carbon ionic liquid electrode; Dihydroxybenzene isomers; Simultaneous determination; Ionic liquids
资金
- National Outstanding Youth Foundations of China
- National Science Foundation of China [50725825]
- Higher Education of China [20060532006]
Simultaneous determination of dihydroxybenzene isomers was investigated at a multi-wall carbon nanotubes (MWCNTs)/beta-cyclodextrin composite modified carbon ionic liquid electrode in phosphate buffer solution (pH 7.0, 1/15 mol/L) in the presence of cationic surfactant cetylpyridinium bromide (CPB). With the great enhancement of surfactant CPB, the voltammetric responses of dihydroxybenzene isomers were more sensitive and selective. The oxidation peak potential of hythoquinone was about 0.024 V, catechol was about 0.140 V and resorcinol 0.520 V in differential pulse voltammetric (DPV) measurements, which indicated that the dihydroxybenzene isomers could be separated entirely. The electrode showed wide linear behaviors in the range of 1.2 x 10(-7)-2.2 x 10(-3), 7.0 x 10(-7)-1.0 x 10(-3), 2.6 x 10(-6)-9.0 x 10(-4) mol/L for hydroquinone, catechol and resorcinol, respectively. And the detection limits of the three dihydroxybenzene isomers were 4.0 x 10(-8), 8.0 x 10(-8), 9.0 x 10(-7) mol/L, respectively. The proposed method could be applied to the determination of dihydroxybenzene isomers in artificial wastewater, and the recovery was from 97.4% to 104.2%.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据