二甲酚橙－－铋(Ⅲ)树脂相分光光度法测定水中痕量铋

摘要

A new anaytical method for direct resin phase spectrophotometric detemination of trace bismuth hasbeen develolped. It has been used to determine bismuth in water and satisfactory results were ohtained.%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H2SO4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，适用于水中痕量铋的测定．