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.
