| 硼钼杂多酸-罗丹明B缔合显色反应的研究与应用 |
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| 引用本文： | 刘淑萍,刘占峰. 硼钼杂多酸-罗丹明B缔合显色反应的研究与应用[J]. 分析试验室, 2001, 20(3): 43-45 |
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| 作者姓名： | 刘淑萍 刘占峰 |
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| 作者单位： | 1. 河北理工学院化工系,
2. 威格拉斯仪器北京有限公司, |
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| 基金项目： | 河北省自然科学基金资助项目 |
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| 摘 要： | 研究了在聚乙烯醇存在下 ,罗丹明 B( RDB)与硼钼杂多酸的离子缔合显色反应。在合适的硫酸介质环境下 ,形成硼钼杂多酸 ,再与 RDB形成离子缔合物 ,其 λmax=570 nm,ε570 =1 .0× 1 0 5L· mol-1· cm-1,硼浓度范围在 0～1 .2μg/2 5m L符合比尔定律。用等摩尔连续变化法 ,平衡移动法确定 B∶ Mo∶RDB=1∶ 7∶ 4。方法已用于添加硼烧结矿中微量全硼的测定
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| 关 键 词： | 硼钼杂多酸 罗丹明B 分光光度法 硼 微量分析 缔合显色反应 |
| 文章编号： | 1000-0720(2001)03-0043-03 |
Colour reaction of the ion-associate complex of molybdoboric heteropoly acid-rhodamine B and its application |
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| LIU Shu-ping,LIU Zhan-feng. Colour reaction of the ion-associate complex of molybdoboric heteropoly acid-rhodamine B and its application[J]. Chinese Journal of Analysis Laboratory, 2001, 20(3): 43-45 |
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| Authors: | LIU Shu-ping LIU Zhan-feng |
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| Abstract: | A new colour reaction of ion-associate complex of molybdoboric heteropoly acid-rhodamine B in the presence of polyvingl alcohol was studied. The ion-associate complex exhibits maximum absorptivity at 570 nm, its apparent molar absorpivity was found to be 1.0×105. Beer's law is obeyed in the range of 0 to 1.2 μg/25 mL for boracium. The molar ratio of B to RDB and B to Mo in ion-associate complex was established to be 1∶4 and 1∶7 by the equimolar continual shift method and the equilibrium shift method. The complex is supposed to be an ion-associate complex with the possible formula of ［BMoⅤMoⅥ6O24］. The poroposed method was used to determine trace boracium in sintering are sample with satisfactory results. |
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| Keywords: | Rhodamine B Molybdoboric heteropoly acid Spectrophtometry |
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