By using single sweep oscillopolarography, the composition ratio of the adsorptive bady has been determined to be La: Zn: ARS=1: 1: 4 by the simplex method and the method of continuous variations.

• 在单扫示波极谱上用单纯形法和连续变化法测定了该体系吸附型体的组成比为:La:Zn:ARS=1:1:4。