Analysis of chloride-doped cadmium sulfide by ion chromatography

Cadmium sulfide doped with cadmium chloride can be used as a superconductor at noncryogenic temperatures. The level of chloride and its manner of incorporation (either within the crystal lattice or merely as an intimate mixture) may be critical parameters to the effectiveness of the compound as a superconductor. Procedures for the rapid determination of chloride were described. It was demonstrated that cadmium sulfide could be dissolved in alkaline hydrogen peroxide and subsequently analyzed for total chlorine and sulfur content by ion chromatography. Possibly total bromine and the other halogens can be similarly characterized in halogen-doped cadmium sulfide. The soluble anionic components of cadmium sulfide can be profiled by ion chromatography after extraction by sonication. 4 tables. (DP)