Studies on the HPLC determination of xanthates via copper(I) xanthates and dixanthogens |
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| Authors: | Chunshan Zhou Albert Bahr Georg Schwedt |
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| Affiliation: | (1) Institute of Mineral Processing and Benefication, Division of Flotation, Technical University, D-3392 Clausthal-Zellerfeld, Federal Republic of Germany;(2) Department of Chemistry, Central South University of Technology, Changsha/Hunan, Peoples Republic of China;(3) Institute of Inorganic and Analytical Chemistry, Technical University, Paul-Ernst-Strasse 4, D-3392 Clausthal-Zellerfeld, Federal Republic of Germany |
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| Abstract: | Summary Two HPLC methods for the determination of individual alkyl xanthates in mixtures are described. They are based on the formation of copper xanthate complexes and the oxidation of xanthates to dixanthogens, respectively. The reversed-phase chromatographic behaviour of both types of compounds together with the optimization of separation and determination conditions are discussed in detail. It is shown by several determinations of synthetic and practical flotation samples that the two methods provide an identical reliability for the analysis of xanthates and could complement each other. The detection limits (301 resp. 240 nm) are as low as 3.1 · 10–8 mol/l (metal xanthate complexes) and 1.6 · 10–8 mol/1 (dixanthogens). The methods described are suitable for flotation, chemical industry and environmental analysis.
Untersuchungen zur HPLC-Bestimmung von Xanthaten über Kupfer(I)-xanthate und Dixanthogene |
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