以亮绿为指示反应的催化光度法测定痕量锰  

Catalytic Spectrophotometric Determination of Trace Manganese (Ⅱ)

作　　者：姚凤姬[1] 苏雁 慈云祥[1] 

机构地区：[1]北京大学化学系

出　　处：《北京大学学报（自然科学版）》1990年第6期663-666,共4页Acta Scientiarum Naturalium Universitatis Pekinensis

摘　　要：本文通过研究锰对KIO_4氧化亮绿的催化作用的适宜条件,建立了测定痕量Mn的分析方法,测定波长为460nm,符合比尔定律的范围是0.1～2.5ppb,检测限为3.8×10^(-11)g/ml,测定婴儿食品中锰含量得到满意结果。A new kinetic spectrophotometric method is described for the determination of trace manganese(Ⅱ), based on its catalytic effect on the oxidation of Brilliant Green by KIO4. Optimal experimental conditions have been established for the determination of Mn(Ⅱ).Beer's law is obeyed in the concentration range of 0.1ppb to 7ppb(λ= 460nm). The detection limit for Mn is 3.8×10-5μg/ml. The proposed methods is suitable for the direct determination of Mn in food products such as rice flour.

关 键 词：锰 催化光度法 亮绿 测定 

分 类 号：O614.711[理学—无机化学]