| 稀土（Ⅲ）—三溴偶氮胂络合物极谱吸附波的研究 |
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| 引用本文： | 彭晖,黎拒难.稀土（Ⅲ）—三溴偶氮胂络合物极谱吸附波的研究[J].理化检验(化学分册),1998,34(9):392-394. |
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| 作者姓名： | 彭晖 黎拒难 |
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| 作者单位： | 湘潭大学化学化工学院!湘潭411105 |
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| 摘 要： | 在PH9.0的氨水-氯化铵缓冲溶液中,稀土(Ⅲ)与三溴偶氮胂在-0.69V(vs.SCE)处产生一灵敏的极谱波,二次导数峰高与稀土浓度在3.O×10~(-8)～9.0×10~(-7)mol·L~(-1)范围内呈线性关系,检出限为2.O×10~(-8)mol·L~(-1).探讨了该极谱波的性质和电极反应机理.用此法测定了球墨铸铁中的稀土总量,结果满意.
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| 关 键 词： | 稀土(Ⅲ) 三溴偶氮胂 极谱络合吸附波 |
STUDY ON THE POLAROGRAPHIC ADSORPTIVE WAVES OF COMPLEXES OF RARE EARTH (? ) AND TRIBROMOARSENAZO |
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| Peng Hui. Li Junan and Li Hai.STUDY ON THE POLAROGRAPHIC ADSORPTIVE WAVES OF COMPLEXES OF RARE EARTH (? ) AND TRIBROMOARSENAZO[J].Physical Testing and Chemical Analysis Part B:Chemical Analgsis,1998,34(9):392-394. |
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| Authors: | Peng Hui Li Junan and Li Hai |
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| Abstract: | Sensitive adsorptive waves of complexes of rare earth ( ? ) and tribromoarsenazo are obtained by using single-sweep polarography in 0. 8mol ?L_(-1) ammoniacal buffer solution at pH 9. 0. The peak potential is ?0. 69V(vs. SCE). The peak height is proportional to the concentration of RE( ? ) over the range from 3. OX 10~(-8) to 9. 0X10~(-7)mol ?L~(-1). The limit of detection is 2. 0X10~(-8)mol ?L(-1). The properties of the polarographic waves and the electrode reaction mechanism are discussed in detail. The method has been applied to the determination of the trace RE( ? ) in several nodular cast iron with satisfactory results. |
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| Keywords: | Rare Earth(? ) Tribromoarsenazo Polarographic adsorptive wave |
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