Abstract

A ternary complex between iron(III), Chromal Blue G (C. I. 43835) and cetyltrimethylammonium chloride is proposed for the determination of iron (III). The stoichiometric ratio of iron (III) to Chromai Blue G is 1∶3. Beer's law is obeyed from 0.04 to 0.4 ppm of iron; the molar absorptivity is 1.43×105 l·mole−1·cm−1. The proposed method has been applied to the determination of iron in a magnesium alloy.

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