Aerosol-OT micelles in Sephadex gels for concentrating metal-dithizone chelates from water

被引：5

作者：

Saitoh, T ^{[1
]}

Hattori, K ^{[1
]}

Hiraide, M ^{[1
]}

机构：

[1] Nagoya Univ, Grad Sch Engn, Dept Mol Design & Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan

来源：

ANALYTICA CHIMICA ACTA | 2005年 / 543卷 / 1-2期

关键词：

aerosol-OT; sephadex gel; micelles; dithizone complex; heavy metals; river water; water analysis;

D O I：

10.1016/j.aca.2005.04.047

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Anionic surfactants, sodium dodecyl sulfate (SDS), and di-2-ethylhexyl sodium sulfosuccinate (Aerosol-OT, AOT), were incorporated into a hydrated macroreticular anion-exchanger such as a DEAE- or QAE-Sephadex A-25 gel. The observation of fluorescence spectra of N-phenyl-1-naphthlamine indicated the formation of the surfactant micelles in gels. The hydrophobicity of the micelles corresponded to octanol, tetrahydrofuran, or ethyl acetate. A hydrophobic chelating agent, dithizone (1,5-diphenylthiocarbazone), and its metal chelates were incorporated into the Sephadex gels. The complex formation with dithizone and the subsequent adsorption on Sephadex gels required 10 min. The metals collected in gels were desorbed with 8 M nitric acid. As a result of 300-fold concentrations, traces of heavy metal ions at ng l(-1) levels in river water were successfully determined by graphite-furnace atomic absorption spectrometry. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：25 / 30

页数：6

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