Abstract
Abstract 5,7-Diiodo-8-hydroxyquinoline (diiodo-oxine) has been used as an analytical reagent for the spectrophotometric determination of zirconium with which it forms a yellow colored complex (1 : 2) in dilute hydrochloric acid solution. The complex is extractable into chloroform from 0.1—0.2 mol dm−3 HCl showing an absorption maximum at 417.5—421 nm with a molar absorptivity of 1.87 × 104 dm3 mol−1 cm−1 and Sandell sensitivity equal to 4.8 × 10−3 μgZr cm−2. Beer’s law holds good in the range 0—5 μgZr cm−3, with a standard deviation ±0.006 and relative mean error ±0.36%. The method is simple, selective and sensitive.
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