Chemiluminescence Determination of Thiourea Using Tris(1,10-phenanthroline)-ruthenium(Ⅱ)-KMnO4 System

The light emission produced by thiourea in oxidation process by permanganate in acidic solution in the presence of Ru(phen)2+3 is used to determine 1.0×10-8-1.0×10-5 mol/L thiourea. The limit of detection is 9.8×10-9 mol/L and the relative standard deviation is 1.1% for a 1.0×10-5 mol/L thiourea solution (n=10). The method was applied satisfactorily to the determination of thiourea.