A simple, rapid, precise, and accurate method is described for the simultaneous and quantitative determination of conjugated and unconjugated chlorpromazine metabolites in urine. It depends on reduction of sulfoxides to sulfides, and oxidation of sulfides to ion radicals in a solution of Fe-I-a (lO-N) in l8N H2S04.Absorbance is measured at 422, 530, 565, and 700 nm, and concentration of metabol...
