Amperometric Determination of Bismuth Using Gallacetophenone Phenylhydrazone with the Structural Elucidation of Complex

D.v Krishna Reddy ,A Varada Reddy

doi:10.1155/2010/178529

Abstract

Gallacetophenone phenylhydrazone (GPPH) has been used as an analytical reagent for amperometric determination of bismuth. Bismuth is quantitatively determined by GPPH at pH 3.0-6.0. After studying the polarographic behaviour of GPPH and bismuth(III) at dropping mercury electrode (DME), applied potential was fixed at -0.4vvs. saturated calomel electrode (SCE). The method was applied for the determination of bismuth in wood’s alloy. The composition of the complex corresponds to the formula Bi(C14H14O3N2)2. The structure of the complex was arrived from the micro analytical data of the solid complex, thermogravimetric and differential thermal analysis curves and also from the infrared spectra of the complex.

Highlights

A very few analytical reagents have been employed for the determination of bismuth(III). 8-Hydroxy quinoline[1], EDTA2 and k-morpholine-4-dithio carboxylate[3] have already been reported as amperometric titrants for bismuth
As hydrazones and phenylhydrazones have not been employed so far, an attempt has been made to find out the usefulness of Gallacetophenone phenylhydrazone (GPPH) which has phenolic hydroxyl groups for the quantitative determination of bismuth(III)
The polarographic behaviour of gallacetophenone phenylhydrazone and bismuth(III) at dropping mercury electrode (DME) was studied to arrive at the suitable voltage to be fixed for the amperometric determination of bismuth. 25 mL of the acetate buffer, 5 mL of 0.2 M tartaric acid solution, 5 mL of 0.01M reagent, 1 mL of 0.2% gelatin and 5 mL of alcohol were taken in a titration cell and diluted to 50 mL

Summary

Introduction

A very few analytical reagents have been employed for the determination of bismuth(III). 8-Hydroxy quinoline[1], EDTA2 and k-morpholine-4-dithio carboxylate[3] have already been reported as amperometric titrants for bismuth. A very few analytical reagents have been employed for the determination of bismuth(III). As hydrazones and phenylhydrazones have not been employed so far, an attempt has been made to find out the usefulness of GPPH which has phenolic hydroxyl groups for the quantitative determination of bismuth(III).

Results

Conclusion