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Phosphate solubility tests—interference of some accessory minerals
Author(s) -
Axelrod Shimshon,
Greidinger Dahlia
Publication year - 1979
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740300209
Subject(s) - solubility , apatite , phosphate minerals , chemistry , calcite , phosphate , citric acid , gypsum , inorganic chemistry , phosphorite , struvite , formic acid , ammonium , mineralogy , geology , chromatography , organic chemistry , paleontology
Solubilities of apatites isolated from random samples of Israeli phosphates were determined in citric acid, formic acid and neutral ammonium citrate. Minerals normally associated with the apatites in rock phosphates were then added and the solubility tests repeated. Calcite markedly reduced the apparent solubility in the three solvents but gypsum interfered only in the case of neutral ammonium citrate. The accepted solubility tests therefore favour phosphates containing inert accessory minerals such as quartz and do not reflect the solubility of apatite when it is associated with calcite. A method based on determining the solubility of apatite instead of rock phosphate is suggested.