ISSN:
1040-0397
Keywords:
Gold
;
Rock
;
Stripping voltammetry
;
Noble metals
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
This article proposes a method for detecting the concentration of gold ions in solutions with high oxidation/reduction potential (ORP), such as aqua regia, a hypochlorite-iodine mixture, and a new proprietary liquid bromine carrier solution, by direct current anodic stripping voltammetry (DCASV). The working electrode is a graphite electrode impregnated with a mixture of epoxy resin and polyethylene amine. The article discusses: possible cause of a double stripping peak for gold appearing in voltammograms in aqua regia solution with electrolysis potentials less than -0.4 V; differences in coefficients of the working electrode's sensitivity in the above mentioned solutions. A relative standard deviation of the results in determining gold concentration in solutions of rock (ORP 〉 0.9 V), which were obtained by the proposed method and by atomic-absorption spectrophotometry, did not exceed 0.2.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140080118
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