|
|||||
|
|
| Study of Competitive Chelating Reaction between Lanthanum and Tribromoarsenazo in the Medium of Weak Acid by Capillary Zone Electrophoresis | |
| 作者姓名： | 胡涌刚 周培疆 邓延倬 程介克 |
| 作者单位： | Department of Environmental Science，Huazhong University of Science and Technology，Hubei 430074，China，Department of Environmental Science，Wuhan University，Hubei 430072，China，Center of Analysis and Testing，Wuhan University，Hubei 430072，China，Department of Chemistry，Wuhan University，Hubei 430072，China |
| 基金项目： | Supported by the National Natural Science Foundation of China (No. 20005005)，Chengguang Project of Wuhan, and Visiting Scholar Foundation of Key Lab in University. |
| 摘 要： | Two kinds of metal chelates of rare earth elements reacted with tribrimoarsenazo formed under the condition of critic acid were observed by simultaneous technique of capillary electrophoresis-photothermal interference spectrometry. The tendency of the conversion between these chelates as functions of the mole ratio of the reagent and the metal, pH value and the elapsing time was investigated. Kinetic equation of competitive chelating reaction between the TBA-La (Ⅲ) and La (Ⅲ) -critic acid were established. It was found that the competitive chelating reaction follows second-order kinetics, for this second-order reaction, k = 5. 55 L·mol-1·S-1 . |
Study of Competitive Chelating Reaction between Lanthanum and Tribromoarsenazo in the Medium of Weak Acid by Capillary Zone Electrophoresis |
|
| HU Yong-gang.Study of Competitive Chelating Reaction between Lanthanum and Tribromoarsenazo in the Medium of Weak Acid by Capillary Zone Electrophoresis[J].Journal of Donghua University,2003,20(2). | |
| Authors: | HU Yong-gang |
| Institution: | 1. Department of Environmental Science,Huazhong University of Science and Technology,Hubei 430074,China 2. Department of Environmental Science,Wuhan University,Hubei 430072,China 3. Center of Analysis and Testing,Wuhan University,Hubei 430072,China 4. Department of Chemistry, Wuhan University, Hubei 430072, China |
| Abstract: | Two kinds of metal chelates of rare earth elements reacted with tribrimoarsenazo formed under the condition of critic acid were observed by simultaneous technique of capillary electrophoresisphotothermal interference spectrometry. The tendency of the conversion between these chelates as functions of the mole ratio of the reagent and the metal, pH value and the elapsing time was investigated. Kinetic equation of competitive chelating reaction between the TBA-La (Ⅲ) and La (Ⅲ) -critic acid were established. It was found that the competitive chelating reaction follows secondorder kinetics, for this second-order reaction, k=5.55 L·mol-1·S-1. |
| Keywords: | capillary electrophoresis photothermal tribrimoar- senazo competitive chelating reaction |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |