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Abstract

SELECTIVE SPECTROPHOTOMETRIC DETERMINATION OF IRON USING SCHIFF’S BASE ‘5-[(PHENYLIMINOETHYL)]3-HYDROXY PHENOL’

Shulmith M. Sawant*, Rama S. Lokhande, Leena Khadke, Suhas P. Janwadkar,Dilip K. Yadav, Paritosh K. Rana

ABSTRACT

5-[(Phenyliminoethyl)] 3-hydroxy phenol [PIEHP], a new analytical reagent is proposed as a sensitive spectrophotometric reagent for Fe (III). The reagent PIEHP is selective and free from interference of most of the ions. It is a Schiff base and synthesized in the laboratory and characterized by NMR, IR and C,H,N elemental analysis. A selective spectrophotometric method is presented for the trace determination of Fe(III) using PIEHP as spectrophotometric reagent (λmax = 430 nm) in acidic aqueous solution (pH = 3.0). The Beer’s law is obeyed in the concentration range from 1 to 5 ppm. The PIEHP forms a 1:2 violet coloured complex. The Sandell’s Sensitivity is 0.07692 μg cm-2 with molar absorptivity 0.726 x 104 L mol-1 cm–1. The proposed method has been successfully applied to the determination of vanadium in alloy. The precision and the accuracy obtained were satisfactory for its use in the concerned industry.

Keywords: Iron, Spectrophotometry, n-Butanol, 5-[(Phenyliminoethyl)]3-hydroxy phenol, Schiff’s base.


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