聚酰胺富集吸光光度法测定银

聚乙内酰胺作为Ａｇ的富集剂，从稀ＨＮＯ３溶液中富集Ａｇ具有吸附速度快，解脱容易，吸附容量大且可重复使用等优点。在选择条件下，最大吸附容量达５０ｍＬ／ｍｉｎ，并作１８种元素干扰实验确定允许量。

Determination of Silver by PolyamidePreconcentration and Spectrophotometry

A new kind of polyamide was made forthe separation and preconcentration of silver.In a medium of dilute nitric acid,silver can beadsorbed on the polyamide completely by con-trolling the flow rate to less than 50 mL/min.The adsorbed silver can be eluted with 5%Na_(2)SO_3 and determined by spectropho-tometry. Eighteen coexisting ions have no in-terference with the determination of silver bythis method The method is sensile,accurate,rapid and has been used for the determinationof silver in standard samples and ores. Satis-factory results have been obtained in the de-termination of silver in the range of 0.5 to200g/t.