催化－导数分光光度法测定石蜡中的痕量锰  

Determination of Trace Manganese in Ozoceriteby Catalytic-Derivative Spectrophotometry

作　　者：黄玮[1] 刘立行[1] 项世法[1] 

机构地区：[1]抚顺石油学院应化系,大连理工大学物理系

出　　处：《分析试验室》1994年第6期46-48,共3页Chinese Journal of Analysis Laboratory

摘　　要：本文提出催化－导数分光光度法的原理，并将此原理用于锰（Ⅱ）在碱性介质（ｐＨ值９．８）中催化过氧化氢氧化钙红（ＣＲ）褪色￣［１］的反应，成功地测定了石蜡中的痕量锰。本文还详细地考查了萃取分离干扰离子的条件。其表现摩尔吸光系数为７．４×１０￣７Ｌ．ｍｏｌ￣（－１）．ｃｍ￣（－１），最低检测限为２．５ｎｇ／２５ｍＬ，该法的灵敏度为一般催化法对应反应体系的５．９倍。In this paper,the caralytic-devivativespectrophotometry was proposed to determine traceYnanganese in ozocerite, The method is based on thefact that in a buffer solution of pH9. 8 manganese(Ⅱ)can catalyze the decoloring reaction resulting from theoxidation of Cal-Red by hydrogen peroxide. Theextraction conditions for separation of Mn frominterfering ions were studied.The apparent molarabsorptivity is 7.4 × 10￣7 L· mol￣(-1)·cm￣(-1).Thedetection limit is 2. 5ng/25mL. The sensitivity of thecatalytic-derivative spectrophotometry is 5.9 timesbetter than that of the catalytic spectrophotometry.

关 键 词：催化光度法 石蜡 锰 

分 类 号：O614.711[理学—无机化学]