Cyanide ion-selective electrode measurements in the presence of copper

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TypeArticle
Journal titleJournal of Electroanalytical Chemistry
Volume508
Pages97104; # of pages: 7
SubjectIon selective electrodes (ISE); Cyanide; Analysis of cyanide; Metal compexes; Equilibria
AbstractThe response of a cyanide ion-selective electrode (ISE) in the presence of copper has been investigated. The interferences of metal ions, like copper, on the response of the cyanide ISE prevents its use for routine direct analysis of metal cyanide containing waste water. In this work an improved understanding of the chemistry at the electrode, and the effects of different cyanide and copper concentrations and matrix pH values on the electrode response, has been developed. Based on this insight, a semi-empirical approach is described to allow calibration of the ISE enabling the estimation of total cyanide. While not as robust as, for example, total cyanide distillation, it provides an inexpensive, rapid and convenient approach for more frequent and widespread screening of industrial waste waters.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number52282
NPARC number16285560
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Record identifier4f354dac-fcea-4e96-b34c-98ec60541699
Record created2010-10-27
Record modified2016-05-09
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