OPTIMIZING CONCENTRATION DETERMINATIONS IN PRESENCE OF ADSORPTION PHENOMENA USING VIBRATING DROPPING MERCURY ELECTRODE

被引:15
作者
CONNERY, JG
COVER, RE
机构
[1] Department of Chemistry, St. Johnʹs University
关键词
D O I
10.1021/ac60279a017
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
The vibrating dropping mercury electrode (VDME) is demonstrated to be significantly superior to the DME for most analytical purposes where adsorption phenomena can inhibit electrode response. Four examples of inhibitory phenomena associated with the adsorption of electroinactive substances are examined and the advantages of the VDME demonstrated. Two systems which give adsorption waves at the DME with consequent nonlinear response to concentrations are shown to give linear response at the VDME. The fundamental characteristics of the VDME which cause the improved responses are the short drop time and the large rate of area formation as compared to the DME. Both of these factors operate to minimize the extent of surface coverage byadsorbate during detector life. © 1969, American Chemical Society. All rights reserved.
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页码:1191 / &
相关论文
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