偶氮邻苯二酚苯基萤光酮分光光度法测定微量锡的研究  

Spectrophotometric Determination of Trace Tin with P-DP-PF

作　　者：杨问华[1,2,3] 刘先国[1,2,3] 李德豪 聂保民 

机构地区：[1]中国地质大学武汉管理干部学院化学系 [2]广东省石化专科学校环保系 [3]北京时代广场发展有限公司

出　　处：《广东工业大学学报》1997年第S1期39-41,共3页Journal of Guangdong University of Technology

摘　　要：在吐温－８０存在下，ｐＨ为７．０～８．５的ＫＨ２ＰＯ４－硼砂缓冲溶液体系中，锡与新显色剂偶氮邻苯二酚苯基萤光酮形成１∶２的络合物，其最大吸收波长为５５６ｎｍ，表观摩尔吸光系数为２．９×１０５Ｌ·ｍｏｌ－１·ｃｍ－１，锡质量浓度在０～０．２４ｍｇ／Ｌ符合比尔定律，该方法可不经分离用于岩石中微量锡的直接测定，结果满意。The complex of tin(Ⅳ) with P-DP-PF and Tween-80 is formed in the pH range from 7.0 to 8.5,It′s maximum absorption is at 556nm,and apparent molar absorptivity is 2.9×10 5L·mol -1 ·cm -1 ,Beer′s law is obeyed for tin in the range of concentration 0～6μg/25 mL.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 偶氮邻苯二酚苯基萤光酮 

分 类 号：O657.32[理学—分析化学]