锌—漂蓝6B—喹啉—溴化十六烷基三甲铵多元配合物显色反应的应用

Colour Reaction of Zinc with Eriochrome Azurol 6B,Quinoline and Cetyltrimetnylammonium Bromide

本文研究了锌与漂蓝6B,喹啉和溴化十六烷基三甲铵在pH8.2～9.5区间生成绿色四元配合物.该配合物的最大吸收波长在600nm处,摩尔吸光系数为1.1×10~5L·mol^(-1)·cm^(-1),锌量在0～16μg/25ml范围内遵守比尔定律.四元配合物的组成是Zn:ECAB:喹啉:CTMAB=1:2:3:6.许多常见离子不干扰测定,方法用于矿石中微量锌的测定,获得了满意的结果.

A sensitive cdour reaction of Zinc with Eriochrome azurol 6B (ECAB), quinoline and cetyltri-tnethylaramonium bromide (CTMAB) has been investigated in the pH range of 8.2 to 9.5.The maximum absorption of the quaternary complex is measured at 600nm and molar absorptivity is 1.1×105L mol-1 cm-1. Beer's law is obeyed in the range of 0-l6ug/25 ml for Zn. The molar ratio of Zn to ECAB, qui-moline and CTMAB is 1 : 2 : 3 : 6, Many elements do not interfere. This mathod has been applied to the determination to micro amounts of zn in the ores with satisfactory results.