锡(Ⅳ)-偶氮邻苯二酚苯基荧光酮-吐温-80体系分光光度法测定岩石中微量锡  

Spectrophotometric Determination of Trace Tin with P DP PF

作　　者：王评 刘先国[2] 杨问华[2] 

机构地区：[1]地矿部兰州水文地质工程地质中心 [2]中国地质大学武汉管理干部学院化学系

出　　处：《光谱实验室》1998年第6期55-57,共3页Chinese Journal of Spectroscopy Laboratory

摘　　要：ｐＨ值在７．０—８．５的范围内，锡与偶氮邻苯二酚苯基荧光酮、吐温－８０形成络合物，其最大吸收峰５５６ｎｍ，摩尔吸光系数２．９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，锡的含量在０—６μｇ／２５ｍＬ范围内遵守比耳定律。本方法对干扰离子的影响和消除进行了研究。本方法已被用于岩石样中锡的测定，结果满意。The complex of tin(Ⅳ) with P DP PF and Tween 80 is formed in the pH rage of 7.0—8.5,Its maximum absorption is at 556 nm,and molar absorptivity is 2.9×10 5L·mol -1 ·cm -1 .Beer's law is obeyed for 0—6μgSn/25mL.The influence of foreign ions and their climinution have also been studied.The method has been applied to the determination of Sn in ores with satisfactory results.

关 键 词：锡 分光光度法 偶氮邻苯二酚苯基荧光酮 岩石 测定 吐温-80 

分 类 号：P585.3[天文地球—岩石学]