Impedance measurements with phospholipid-coated mercury electrodes

被引：24

作者：

Rueda, M ^{[1
]}

Navarro, I ^{[1
]}

Ramirez, G ^{[1
]}

Prieto, F ^{[1
]}

Nelson, A ^{[1
]}

机构：

[1] Univ Seville, Dept Phys Chem, E-41012 Seville, Spain

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 454卷 / 1-2期

关键词：

phospholipid-coated mercury electrodes; impedance; biomimetic membrane;

D O I：

10.1016/S0022-0728(98)00276-9

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Electrochemical measurements of impedance at dioleoylphosphatidylcholine (DOPC) coated mercury electrodes have been applied to several experimental situations and carried out using different procedures. Firstly the DOPC and gramicidin-modified DOPC coated electrodes were studied in the absence of electroactive species in solution. Secondly the gramicidin-modified DOPC coated mercury electrode was studied in the presence of Tl+ ions in solution. The procedures consisted of: (i) potential and frequency sweeps on a single adsorbed DOPC monolayer, (ii) potential and frequency sweeps on a single adsorbed DOPC layer including an electrochemical pre-treatment before every perturbation step and (iii) experiments each carried out at successive frequencies or potentials on successively formed adsorbed DOPC monolayers respectively. The guidelines to be followed in order to check the consistency of the results and to establish the most suitable experimental conditions are outlined in the paper. The results are compared to similar experiments on uncoated hanging mercury electrodes in order to explain the observed behaviour. (C) 1998 Elsevier Science S.A. All rights reserved.

引用

页码：155 / 160

页数：6

共 30 条

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