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AN-H-108

Determination of ferric ion in hydrometallurgical leach liquors


Summary

A measured amount of acidic hydrometallurgical leach liquor is pH modified with a small amount of glacial acetic acid, and the Fe(III) content reduced to Fe(II) with iodide ion. The liberated iodine is titrated with standard thiosulfate solution to an exothermic endpoint. Thus, 1 mol Fe3+= 1 mol S2O32-.

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Metrohm AG

Ionenstrasse
9100 Herisau

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