Abstract
The synthesis, characteristics and analytical applications of di-2-pyridyl ketone azine are described. This compound reacts with iron(II) to produce a red 3: 1 complex (λmax. 460 nm, ε= 9·3 × 103 l mol–1 cm–1 in aqueous ethanolic solution) and a green 3: 1 complex (λmax. 750 nm, ε= 4·5 × 103 l mol–1 cm–1 in aqueous ethanolic solution and 6·4 × 103 l mol–1 cm–1 in chloroform). The green complex, extracted into chloroform, has been used for the spectrophotometric determination of trace amounts of iron. The method is selective and has been applied to the determination of iron in some industrial waste waters.
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