二甲酚橙——铋(Ⅲ)树脂相分光光度法测定水中痕量铋

Determination of Trace Bismuth in Water by Xylenal Orange-Bismuth(Ⅲ) Resin Phase Spectrophotometry

本文研究了利用树脂相通过光度法测定痕量铋的新方法 .Bi3+ 在pH =1 .5的H2 SO4介质中与二甲酚橙形成紫红色配合物 ,将其富集在聚苯乙烯阳离子交换树脂上 ,将着色的树脂装入 0 .5cm比色皿中直接测定 .本法操作简便 ,有较好的选择性 。

A new anaytical method for direct resin phase spectrophotometric deternination of trace bismuth has been developed.It has been used to determine bismuth in water and satisfactory results were ohtained.