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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)

Thursday, November 14, 2019

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