新显色剂间氟苯基荧光酮-硫脲-CTAB光度法测定微量铋

Spectrophotometric Determination of Microamounts of Bismuth with New Colour Reagent m-Fluorophenylfluorone-Thiourea-CTAB

本文研究了新显色剂间氟苯基荧光酮在硫脲和阳离子表面活性剂CTAB存在下,测定微量铋的显色反应。该体系的摩尔吸光系数为1.83×10~5,是个高灵敏度的新体系。采用巯基棉分离,能显著提高方法的选择性。已用拟定的方法测定了纯锡中的微量铋。

A highly sensitive chromogenic reaction of bismuth with a new colour reagent m- fluorophenylfluorone-thiourea-CTAB has been investigated. The molar absorptivity is 1. 83×10~5L·mol^(-1)·cm^(-1). After separation with sulfhydrylated cotton,the method becomes highly selective. The method has been applied to the determination of bismuth content in tin.