Application of the catalytic properties of N-methylthiourea to the determination of In(III) at low levels by square wave voltammetry

作者：Nosal Wiercinska Agnieszka^*; Dalmata Grazyna

来源：Monatshefte fur Chemie, 2009, 140(12): 1421-1424.

DOI：10.1007/s00706-009-0203-x

• Indium(III) determination
• N-Methylthiourea
• Cadmium
• Lead
• Dropping mercury electrode
• Square wave voltammetry

This article proposes a simple and fast method of In(III) determination in the presence of Cd(II) and Pb(II). The catalytic activity of N-methylthiourea was used in the In(III) electroreduction, which also had a slight effect on the electroreduction process of Cd(II) and Pb(II). By applying square wave voltammetry it was possible to determine 3 x 10(-7) mol dm(-3) In(III) in the presence of 5 x 10(-5) mol dm(-3) Cd(II) and 1 x 10(-4) mol dm(-3) Pb(II) in 5 mol dm(-3) NaClO(4) at pH 2. The calibration curve for In(III) was linear from 3 x 10(-7) to 5 x 10(-4) mol dm(-3). The relative standard deviation for In(III) determination was about 3.0%.

• 出版日期2009-12