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Voltammetric Behaviour of Nickel in the presence of cobalt and zinc ions and surfactants
Author(s) -
Emons H.,
Hagen St.,
Schmidt Th.,
Werner G.
Publication year - 1990
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19905840121
Subject(s) - nickel , cobalt , zinc , mercury (programming language) , inorganic chemistry , chemistry , electrochemistry , supporting electrolyte , adsorption , electrode , differential pulse voltammetry , selectivity , electrolyte , cyclic voltammetry , catalysis , organic chemistry , computer science , programming language
The reduction of the nickel dimethyldioxime complex at mercury electrodes is investigated in the presence of electrochemically interfering ions (Co 2+ , Zn 2+ ). In addition the influence of various surfactants on the reduction process was studied by differential pulse adsorptive stripping voltammetry. An improvement of the selectivity without a loss of sensitivity was achieved for the trace determination of nickel in the presence of cobalt by the use of an in‐situ modification of the mercury electrode with adsorbed tetrabutylammonium. It is shown that a 10 6 ‐fold excess of zinc does not distrub the nickel signal in the presence of a sufficient amount of ammonia in the supporting electrolyte.