Electrochemical characterization and determination of mercury using carbon paste electrodes modified with cyclodextrins

被引：28
|
作者：
Roa-Morales, G
Ramírez-Silva, MT
González, RL
Galicia, L
Romero-Romo, M
机构：
[1] Univ Autonoma Metropolitana Azcapotzalco, Dept Mat, Mexico City 02200, DF, Mexico
[2] Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico
[3] Univ Autonoma Estado Mexico, Fac Quim, Toluca 50120, Mexico
来源：
ELECTROANALYSIS | 2005年 / 17卷 / 08期
关键词：
carbon paste electrodes; cyclodextrins; mercury;
D O I：
10.1002/elan.200403099
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this work the characterization and determination of mercury in HClO4 media using carbon paste electrodes modified with alpha- and beta-cyclodextrins (CPE alpha-CD and CPE beta-CD) at E-d = - 0.7 V with a t(d) = 20 s and a potential scan nu = 20 mV s(-1) is studied.. The statistical results obtained indicate that the modified electrodes displayed a better analytical performance as compared to that obtained with the unmodified CPE. The detection limits for the CPE alpha-CD and for the CPE beta-CD were 0.05 and 0.09 mu M, respectively, while for the CPE it was 0.41 mu M. The CPE beta-CD exhibited greater sensitivity as compared to that of the CPE alpha-CD.
引用
收藏
页码：694 / 700
页数：7
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