Oxidation of sulphide minerals-VI Ferrous and ferric iron in the water-soluble oxidation products of iron sulphide minerals.
A pseudo-kinetic method has been developed for determining the ferrous and ferric iron in the water-soluble oxidation products of pyrrhotite, pyrite and chalcopyrite, and ores and concentrates containing them. Two determinations are required for each material. In one, the total iron is determined with 1,10-phenanthroline after reduction to Fe(II). In the other, the reduction of Fe(III) is retarded by complexation with fluoride. The difference in the amount of ferrous phenanthranoline complex produced in these two determinations is a function of the original FE(III) concentration and of time.
Steger
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Mineral Sciences Laboratories, CANMET, Department of Energy, Mines and Resources, Ottawa, Canada.