Nagabhushana Bm, Chandrappa Gt, B. Nagappa
Jun 7, 2002
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Influential Citations
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Journal
Analytical and Bioanalytical Chemistry
Abstract
The bidentate ligand diformylhydrazine (OHC–HN–NH–CHO), DFH, combines with iron(II) and iron(III) in alkaline media in the pH range 7.3–9.3 to form an intensely colored red–purple iron(III) complex with an absorption maximum at 470 nm. Beer's law is obeyed for iron concentrations from 0.25 to 13 µg mL–1. The molar absorptivity was in the range 0.3258×104–0.3351×104 L mol–1 cm–1 and Sandell's sensitivity was found to be 0.0168 µg cm–2. The method has been applied to the determination of iron in industrial waste, ground water, and pharmaceutical samples.