Alternating current investigations at the mercury drop electrode on the adsorption potential of metal complexes
Identifieur interne : 002802 ( Main/Exploration ); précédent : 002801; suivant : 002803Alternating current investigations at the mercury drop electrode on the adsorption potential of metal complexes
Auteurs : Sylvia Sander [Allemagne] ; Günter Henze [Allemagne]Source :
- Electroanalysis [ 1040-0397 ] ; 1996-03.
English descriptors
Abstract
In adsorptive stripping voltammetry (AdSV) the analyte is accumulated on the electrode surface in the form of a metal complex and the determination step is carried out voltammetrically. Usually the technique is sensitive to the effects of other absorbable organic substances. Alternating‐current (AC) investigations on the complexes of uranium, vanadium and antimony with chloranilic acid, uranium with cupferron and cobalt and nickel with dimethylglyoxime gave information about their adsorption behavior on the electrode surface. Furthermore the AC voltammetric behavior of the nonionic surfactant Triton X100 was shown. By knowing the adsorption potential and range of adsorption, predictions about the effects of organic adsorbates can be made. Importantly the optimal accumulation potential of the complex for its AdSV‐determination may be obtained. With appropriate potential control the selective accumulation of the analyte complex can be achieved and so avoid the influence of these other adsorbates in favorable cases.
Url:
DOI: 10.1002/elan.1140080310
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Usually the technique is sensitive to the effects of other absorbable organic substances. Alternating‐current (AC) investigations on the complexes of uranium, vanadium and antimony with chloranilic acid, uranium with cupferron and cobalt and nickel with dimethylglyoxime gave information about their adsorption behavior on the electrode surface. Furthermore the AC voltammetric behavior of the nonionic surfactant Triton X100 was shown. By knowing the adsorption potential and range of adsorption, predictions about the effects of organic adsorbates can be made. Importantly the optimal accumulation potential of the complex for its AdSV‐determination may be obtained. 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