| 火焰原子吸收法测定电解二氧化锰中微量铁时锰干扰机理的研究 |
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| 引用本文： | 龙斯华,李益国.火焰原子吸收法测定电解二氧化锰中微量铁时锰干扰机理的研究[J].光谱学与光谱分析,1992,12(3):89-92. |
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| 作者姓名： | 龙斯华 李益国 |
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| 作者单位： | 湘潭大学化学系，湘潭大学化学系，湘潭大学化学系 411105 湘潭，411105 湘潭，411105 湘潭 |
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| 摘 要： | 本文研究了火焰原子吸收法测定电解二氧化锰中微量铁时锰产生负干扰的原因。提出了改变燃烧器高度,选择高温火焰区域,加入EDTA、8-羟基喹啉等释放剂或保护剂来消除干扰的各种方法。对干扰机理也进行了初步探讨,以实验说明在火焰下部低温区生成难解离化合物Mn_x(FeO_y)_z而造成对测定的干扰。
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| 关 键 词： | 二氧化锰 铁 干扰机理 火焰AAS |
STUDIES ON THE MECHANISM OF INTERFERENCE WITH THE MANGANESE IN DETERMINATION OF THE TRACE IRON FROM ELECTROLYTIC MANGANESE DIOXIDE BY FLAME ATOMIC ABSORPTION SPECTROMETRY |
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| LONG Sihua,LI Yiguo and HE Cuie.STUDIES ON THE MECHANISM OF INTERFERENCE WITH THE MANGANESE IN DETERMINATION OF THE TRACE IRON FROM ELECTROLYTIC MANGANESE DIOXIDE BY FLAME ATOMIC ABSORPTION SPECTROMETRY[J].Spectroscopy and Spectral Analysis,1992,12(3):89-92. |
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| Authors: | LONG Sihua LI Yiguo and HE Cuie |
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| Institution: | LONG Sihua,LI Yiguo and HE Cuie Department of Chemistry,Xiangtan University,411105 Xiangtan |
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| Abstract: | In this paper, the determination of the trace iron from the electrolytic manganese dioxide was studied by flame atomic absorption spectrometry. The muse of minus interference arises from the manganese was discussed. Various methods of elimination of the interference were tested.
In this article, interference mechanism was discussed summarily. The compound Mn_x(FeO_y)_z produced in preheating region is difficult to dissociated but into combustion zone of high-temprature will be dissociated. Iron from the compound Mn_x(FeO_y)_z is released, while the iron changes from ion to ground state atoms. As a result interference is eliminated. If 0.5%EDTA, 8-hydroxyquinoline, potassium sulfocyanate or ammonium fluoride is added into sampling solution, production of compound Mn_x(FeO_y)_z will be obstructed. Interference from the manganese (contains 4mg/ml Mn~(2+)) can be eliminated. |
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| Keywords: | Flame atomic absorption spectrometry Determination of the trace-iron Interferential mechanism of the manganese |
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