Since 1955, one of the authors (T.P. chao) has heen making a series of further studies on the systematic analysis of anions which was proposed by bim more then twenty years ago.

• 正>作者之一(赵丹若),自一九五五年以来,把二十多年前所建议的阴离子系统分析法(1,2,3,4,5),又作了进一步的研究;