Activation of zinc sulphide with CuII, CdII and PbII: III. The mass-spectrometric determination of elemental sulphur

A new mass-spectrometric technique, capable of the quantitative detection of very low levels of elemental sulphur on sulphide mineral surfaces has been developed. It is shown that elemental sulphur is formed, under certain conditions, on zinc sulphide surfaces activated by CuII, CdII and PbII. The findings are interpreted in terms of semiconductor theory.