氧化溴酚蓝褪色光度法测定微量锰  

Spectrophotometric determination of manganese by color fading reaction of bromophenol blue oxidized by manganeseⅦ

作　　者：黄典文[1] 黄伟锋[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510090

出　　处：《冶金分析》2001年第5期7-8,共2页Metallurgical Analysis

摘　　要：Mn 的强氧化性对溴酚蓝有褪色作用 ,借此可用分光光度法测定锰。试验表明 ,在 0 72～ 1 44mol/LH2 SO4 介质中 ,有色溶液的最大吸收波长为 434nm ,表观摩尔吸光系数为 1 95× 10 4 ,锰量在 0～ 30 μg/2 5mL范围服从比尔定律。方法简单、快速、准确、选择性好 ,可用于测定某些地质样品中微量锰 ,结果满意。It was show that the color of bromophenol blue can be faded by permanganate in H 2SO 4 solution The degree of color fading is proportional to the concentration of manganese The maximum absorption of color solution is at 434nm,and the apparent molar absorptivity is 1 95×10 4L·moL -1 ·cm -1 The Linear range is 0-30μg/25mL for Mn*' The method was satisfactorily used for the determination of trace manganese in geological sample

关 键 词：锰 溴酚蓝 褪色作用 分光光度法 测定 

分 类 号：O657.32[理学—分析化学]