2002•INDIAN JOURNAL OF CHEMISTRY- SECTION ARequires access

Spectrophotometric determination of iron in trace amount using 5-bromo-salicylaldehyde thiosemicarbazone

G. Ramanjaneyulu, Prabashni Reddy, V. Krishna Reddy, T. Sreenivasulu Reddy

Abstract

A simple, sensitive and specific spectrophotometric method has been developed for the determination of iron(II) in aqueous dimethylformamide (DMF). The metal ion reacts with 5-bromosalicylaldehyde thiosemicarbazone (5-BSAT) forming a green coloured complex in the pH range 5.0-6.0. The complex shows maximum absorption at 385 nm. Beer's law is obeyed in the range 0.28-5.60 μg/ml. The molar absorptivity and Sandell's sensitivity are found to be 1.72×10 4 1 mot - 1 cm - 1 and 0.032 pg cm - 2, respectively. The method has been employed successfully for the determination of Fe(II) in grape leaves, multivitamin capsules and human blood.

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Key concepts: Molar absorptivity, Semicarbazone, Chemistry, Salicylaldehyde, Nuclear chemistry, Dimethylformamide, Aqueous solution, Absorption (acoustics)