| 邻苯二酚紫退色光度法测定微量锰(Ⅱ) |
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| 引用本文： | 刘文明,马卫兴,刘新河.邻苯二酚紫退色光度法测定微量锰(Ⅱ)[J].广州化学,1998(3). |
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| 作者姓名： | 刘文明 马卫兴 刘新河 |
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| 作者单位： | 淮海工学院化工系!连云港，222005，淮海工学院化工系!连云港，222005，淮海工学院化工系!连云港，222005 |
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| 摘 要： | 在硫酸介质中．高锰酸根氧化邻苯二酚紫使其退色，退色程度在一定范围内与高锰酸根加入量成良好的线性关系。据此建立了一种测定微量锰（Ⅱ）的新方法。最大吸收波长λmax＝550nm，表观摩尔吸光系数ε＝4．2×104L·mol-1·cm－1·。锰（Ⅱ）量在0－0．8mg／L范围内符合比耳定律．方法应用于求和面粉中微量锰（Ⅱ）的测定，结果满意。
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| 关 键 词： | 锰 邻苯二酚紫 退色光度法 |
Determination of Trace Manganese by Decolour Spectrophotometric Method |
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| Liu Wenming,Ma Weixing,Liu Xinhe.Determination of Trace Manganese by Decolour Spectrophotometric Method[J].Guangzhou Chemistry,1998(3). |
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| Authors: | Liu Wenming Ma Weixing Liu Xinhe |
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| Abstract: | In this paper, the decolouring reaction which results from the oxidation of pyrocatecholviolet by manganese(Ⅶ)in H2SO4 medium has been studied.The decrease in colour directty pro-portional to the amount of manganese.The maximum absorption is at 550nm with an apparent mo-lar absorptivity6. 5 x 104L. mul-1. cm-1. Beer's law is obeyed from 0 to 0. 8mg/L for man-ganese. The method has deen used for the determination of manganese in some materials with sat-isfactory results. |
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| Keywords: | manganese determination pyrocatechol violet decolour spectrophotometry |
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