A continuous flow system design for simultaneous determination of heavy metals in river water samples

被引:41
作者
Muñoz, E [1 ]
Palmero, S [1 ]
García-García, MA [1 ]
机构
[1] Univ Burgos, Fac Ciencias, Dept Quim, Area Quim Analit, Burgos 09001, Spain
关键词
trace metals; wall-jet cell; potentiometric stripping analysis; continuous flow system;
D O I
10.1016/S0039-9140(02)00138-8
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A new design of a continuous flow system applied to the simultaneous determination of the concentration of zinc(II), cadmium(II), lead(II), copper(II), nickel(II), cobalt(II) and chromium(VI) in river water is described. A flow cell made in the laboratory, which has been patented, based on a 'wall-jet' configuration with a three-electrode system is described. Optimum conditions for the determination of the metal ions are reported. The detection limits and relative standard deviation values were 4.01 x 10(-9) M and 0.078 for Zn(II), 1.76 x 10(-10) M and 0.056 for Cd(II), 4.69 x 10-(10) M and 0.134 for Pb(II), 2.29 x 10-(10) M and 0.138 for Cu(II), 1.61 x 10(-9) M and 0.093 for Ni(II), 1.91 x 10(-9) M and 0.113 for Co(II), and 1.35 x 10(-9) M and 0.081 for Cr(VI). The procedure was applied to a sample of water from the Arlanzon river and the results were compared with inductively coupled mass plasma spectrometry (ICP-MS) as reference method. The final aim of this work is to design a flow system, which can be automated. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:985 / 992
页数:8
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