Abstract
A method is described for the determination of the alumina content of bauxite and red mud, based on the formation of the aluminium fluoride complex and titration of the liberated hydroxide with 0.2 M hydrochloric acid to a potentiometric end-point. The standard deviation is better than ±1% relative. The interference caused by other elements in bauxite and red mud, particularly iron, silicon, calcium and titanium, have been investigated thoroughly.
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