| 有机配合剂稳定高价稀土元素的研究 I.丙二酸水溶液中稳定Pr(IV)的研究 |
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| 引用本文： | 吴大庆,冯殿忠.有机配合剂稳定高价稀土元素的研究 I.丙二酸水溶液中稳定Pr(IV)的研究[J].化学学报,1989,47(11):1109-1112. |
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| 作者姓名： | 吴大庆 冯殿忠 |
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| 作者单位： | 浙江大学化学系;兰州大学化学系 |
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| 摘 要： | 本文通过751G型发光光度计和pHS-2型酸度计, 研究了有机配合剂(Pr(IV)-CH~2(COO)~2^-^2)碱式碳酸盐溶于丙二酸水溶 液中, Pr(IV)在该溶液中的行为和稳定情况。总Pr量用EDTA配位滴定法, 二甲酸橙作指示剂;Pr(IV)分析用碘量法, 并扣除空白。
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| 关 键 词： | 分光光度法 稳定性 水溶液 反应动力学 还原 ＥＤＴＡ 二甲酚橙 碘量法 丙二酸 镨 |
Studies on stabilization of high valence rare earth with organic complexing agent: I. On the stability of Pr(IV) in aqueous malonic acid solution |
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| WU DAQING,FENG DIANZHONG.Studies on stabilization of high valence rare earth with organic complexing agent: I. On the stability of Pr(IV) in aqueous malonic acid solution[J].Acta Chimica Sinica,1989,47(11):1109-1112. |
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| Authors: | WU DAQING FENG DIANZHONG |
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| Abstract: | Under certain condition, Pr(IV,III) basic carbonates are soluble in aqueous solution of malonic acid to yield an yellow complex Pr(IV)-CH2(CO2)22- which shows a broad characteristic absorption band at 265 nm. The complex composition ratio of Pr(IV)-CH2(CO2)22- determine by equilibrium shift is 1:2. Reduction kinetics of Pr(IV)-OH2(CO2)22- complex in aqueous solution is pseudo a first order reaction for Pr(IV). The various factors effecting the stability of Pr(IV)-CH2(CO2)22- complex in the solution were also studied by spectrophotometric methods. |
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| Keywords: | SPECTROPHOTOMETRY STABILITY AQUEOUS SOLUTION REACTION KINETICS REDUCTION EDTA XYLENOL ORANGE IODOMETRY MALONIC ACID PRASEODYMIUM |
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