ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Diethyldithiocarbamates in extraction stripping polarography

J. Labuda and R. Dančíková

Department of Analytical Chemistry, Slovak Technical University, CS-812 37Bratislava

Abstract: Cadmium determination by stripping polarography has been studied in a benzene—methanol medium of 1:1 volume ratio, after Cd²⁺ extraction in the form of diethyldithiocarbamate (the double preconcentration method). Max­ imum current, corresponding to stripping peak Ip, is proportional to the concentration. The method provides accurate results with a 3—9 % relative standard deviation for c(Cd²⁺) = 1 x 10^-6— 1 x 10^-8 mol dm^-3 . Through the analysis of a model mixture of Cu²⁺, Pb²⁺, Cd²⁺, and Zn²⁺ it was proved that complete separation and separate Cu determination were possible and it was found that electrochemical properties of complexes were of decisive import­ ance in Polarographie stripping analysis.

Full paper in Portable Document Format: 376a733.pdf

Chemical Papers 37 (6) 733–739 (1983)