Chemiluminescence Determination of Thiourea Using Tris(2,2′-bipyridyl)ruthenium(II)-KMnO₄ System

Abstract

The emission produced by thiourea in oxidation by permanganate in acidic solution in the presence of Ru(bipy)₃²⁺ is used to determine 1.8×10^-8 to 1.8×10^-6 mol/l thiourea. The limit of detection is 1.0×10^-8 mol/l and the relative standard deviation is 1.1% for a 1×10^-5 mol/l thiourea solution (n=10). The method was applied satisfactorily to the determination of thiourea.