Selective, Simple and Economical Method for the Voltammetric Determination of Bi(III) in the presence Cystine in Non – Complexing Solution

Abstract

Abstract. The simple and fast method for the determination of Bi(III) in non-complexing solution was proposed. The catalytic activity of cystine on Bi(III) ions electroreduction process were utilized. The calibration graph of Bi(III) in 4 mol·dm -3 chlorate (VII) in the presence of 1·10 -2 mol·dm -3 cystine is linear in the range of concentrations of Bi(III) from 7·10 -7 to 4·10 -5 mol·dm -3 . The detection and quantification limits were found to be 1.2·10 -7 mol·dm -3 and 4.02·10 -7 mol·dm -3 , respectively. Precision and recovery of the method were investigated by determination of Bi(III).