Application of liquid membranes to sample preconcentration for the spectrometric determination of cadmium in seawater

被引：31

作者：

Irigoyen, L ^{[1
]}

Moreno, C ^{[1
]}

Mendiguchía, C ^{[1
]}

García-Vargas, M ^{[1
]}

机构：

[1] Univ Cadiz, Dept Analyt Chem, Fac Marine & Environm Sci, E-11510 Puerto Real, Spain

来源：

JOURNAL OF MEMBRANE SCIENCE | 2006年 / 274卷 / 1-2期

关键词：

liquid membrane; DEHPA; preconcentration; heavy metals; cadmium; seawater;

D O I：

10.1016/j.memsci.2005.08.008

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A bulk liquid membrane system has been used as preconcentration tool for the spectrometric determination of cadmium in seawater. The membrane contained di-(2-ethylhexyl)-phosphoric acid (DEHPA) as mobile carrier dissolved in kerosene. The effects of the composition of both organic and aqueous solutions on the permeation of Cd across the membrane were studied, and optimum conditions were found by the modified simplex method. Maximum preconcentration rates were obtained at a sample pH of 4.7, maintained with a 0.1 mol l(-1) acetate buffer solution, a 0.3mol l(-1) HNO3 receiving solution, and a carrier concentration of 0.17 mol l(-1). Under optimum conditions, a preconcentration yield of 100% was obtained for both synthetic and real seawater. The method was successfully applied to the determination of cadmium in real seawater. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：169 / 172

页数：4