| 离子交换分离3,5-二溴水杨基荧光酮-EDTA-CTMAB分光光度法测定微量钍 |
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| 引用本文： | 赛音,张静.离子交换分离3,5-二溴水杨基荧光酮-EDTA-CTMAB分光光度法测定微量钍[J].光谱学与光谱分析,2001,21(6):843-845. |
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| 作者姓名： | 赛音 张静 |
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| 作者单位： | 内蒙古大学化学化工学院,内蒙古,呼和浩特,010021 |
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| 摘 要： | 在EDTA和CTMAB存在下 ,在pH 8 8～ 10 2NH4 Cl NH3 ·H2 O缓冲体系中 ,钍 (Ⅳ )与 3,5 二溴水杨基荧光酮 (3,5 DBSF)形成红紫色多元配合物 ,其最大吸收波长为 5 5 7nm ,表观摩尔吸光系数ε为 2 19× 10 5L·mol-1·cm-1,钍含量在 0～ 7μg·(2 5mL) -1范围内 ,符合比耳定律。经离子交换分离除去干扰离子 ,用本法测定了稀土精矿和寻乌矿中的微量钍。
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| 关 键 词： | 稀土精矿 钍 3 5－二溴水杨基荧光酮 离子交换分离 微量分析 EDTA CTMAB 分光光度法 测定 寻乌矿 |
| 文章编号： | 1000-0593(2001)06-0843-03 |
| 修稿时间： | 2001年6月7日 |
Spectrophotometric Determination of Microamounts of Thorium with 3,5-Dibromosalicylfluorone by Ion-exchange Separation |
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| SAI Yin,ZHANG Jing College of Chemistry and Chemical Engineering,Inner Mongolia University,Hohhot ,China.Spectrophotometric Determination of Microamounts of Thorium with 3,5-Dibromosalicylfluorone by Ion-exchange Separation[J].Spectroscopy and Spectral Analysis,2001,21(6):843-845. |
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| Authors: | SAI Yin ZHANG Jing College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot China |
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| Institution: | College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China. |
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| Abstract: | A method for the determination of Thorium reacting with 3,5-dibromosalicylfluorone, cetyltrimethylammonium bromide and EDTA is proposed. This method is based on the formation of a red-violet colored multicomponent complex in pH 8.8-10.2. The complex has an absorption maximum at 557 nm and its molar absorptivity is 2.19 x 10(5) L.mol-1.cm-1. The Beer Law is obeyed in the concentration range of 0-7 micrograms.25 mL-1 for Th(i.v.). The composition of Th to 3,5-DBSF in the complex is 1:4. All interfering ions may be removed by eluting with 6 mol.L-1 HCl through cation-exchange resin. This method has been used for the determination of Th in Rare-Earth sample ores by ion-exchange separation. |
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| Keywords: | Thorium 3 5 dibromosalicylfluorone Ion exchange separation |
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