间溴偶氮羧-m测定微量铟的研究  

Study on Colorimetric Determination of Indium with Metabromocarboxyazo m

作　　者：王玉华[1] 刘兴芝[2] 丁保宏[2] 周谧[2] 李婷[2] 

机构地区：[1]沈阳师范学院化学系 [2]辽宁大学化学科学与工程学院

出　　处：《辽宁大学学报（自然科学版）》1998年第4期376-380,共5页Journal of Liaoning University：Natural Sciences Edition

摘　　要：本文研究了间溴偶氮羧－ｍ与铟显色反应的最佳条件．在ＨＣｌ－ＫＣｌ介质中，ｐＨ２．７～３．６范围内，铟与显色剂形成１∶２的蓝色配合物，其最大吸收波长为６８６ｎｍ，摩尔吸光系数ε６８６＝１．３８×１０５Ｌ·ｍｏｌ－１·ｃｍ－１．铟含量在０．０４～０．３２μｇ·ｍＬ－１时服从比耳定律．同时还采用了Ｐ３５０反相萃取柱色层分离法使铟与大量干扰离子分离〔１〕，建立了在水相中直接测定微量铟的简便而又迅速有效的方法．Optimum conditions for Metabromocarboxyazo m reacting with Indium was studied in this paper. The ratio of Indium to Metabromocarboxyazo m in HCl KCl medium was 1 to 2 while pH varied from 2.7～3.6, and the maximum absorption is 686nm. Beers Law was followed when the concentration of Indium ranged from 0.04 to 0.32, and molar absorption coefficient(ε[HT5〗 786 ) was 1.38L·mol -1 ·cm -1 . A simple method for determining Indium in water was established by separate disturbing ions.

关 键 词：间溴偶氮羧-M 分光光度法 铟 测定 

分 类 号：O614.372[理学—无机化学]