Abstract
The chloride content of some inorganic orthophosphates and phosphate rock samples has been determined in a medium buffered to pH 2·5 with a mixture of perchloric acid, citric acid and trisodium citrate. The method has been compared with an earlier method which employed a mixture of perchloric acid, citric acid and triethanolamine. The present method is of similar reproducibility and does not suffer from decomposition of the reagents. The interference patterns of several metals are discussed.
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