含钴精细有机化学品中钴的测定

Determination of Cobalt in Cobalt-containing Fine Organic Chemicals

以孔雀绿为衬托剂，二甲酚橙为指示剂，在ｐＨ５～６的六次甲基四胺缓冲体系中用ＥＤＴＡ直接滴定测钴，方法快速、简便，应用于油漆催干剂辛酸钴、橡胶粘合促进剂硼酰化钴等含钴精细有机化学品中钴的测定，结果满意。

This paper describes the direct titration of cobalt at PH 5～6 in hexamethylenetetramine medium using xylenol orange and malachite green as indicator and EDTA as titratant. This method is simple and fast and has been satisfactorily used for the determination of cobalt in cobalt-containing fine organic chemicals,such as paint drier isooctoatal cobalt and rubber adhesion promoter cobalt borate acylate.