In the manufacture of synthetic anionic detergents, it is desirable to obtain accurate control analyses of the product with a minimum expenditure of effort and time.The main ingredients of interest are active (sodium alkyl sulfates or alkylbenzenesulfonates), sodium sulfate and, occasionally, low molecular weight sulfonate additives such as benzene-H, toluene-A, and xylenesulfonates. In addition, color of the product is quite important from the standpoint of quality control. Epton's quaternary titration procedure was quite satis-