The coulometric determination of trace levels of sulphur in gallium phosphide
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in The Analyst
- Vol. 99 (1179) , 376-380
- https://doi.org/10.1039/an9749900376
Abstract
Sulphur present in gallium phosphide has been determined. At 950 °C gallium phosphide reacts with platinum and hydrogen to from GaxPty and platinum phosphide (PtP2), and sulphur is catalytically converted into hydrogen sulphide. The latter is absorbed in an alkaline medium and determined by controlled-potential coulometry at a silver-gauze electrode. The determination of 0·05 µg of sulphur is shown to be possible, the blank value by this method amounting to 0·01 µg of sulphur.Keywords
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