高等学校化学学报

高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (2): 195.

• 研究简报 • 上一篇    下一篇

铜离子对稀土(Ⅲ)DBF-偶氮氯膦体系极谱吸附波的增敏作用研究

晏蓉, 施文赵   

  1. 华中理工大学煤燃烧国家重点实验室、化学系, 武汉, 430074
  • 收稿日期:1993-02-18 修回日期:1993-09-10 出版日期:1994-02-24 发布日期:1994-02-24
  • 通讯作者: 晏蓉,女,25岁,硕士,讲师.
  • 作者简介:晏蓉,女,25岁,硕士,讲师.
  • 基金资助:

    国家自然科学基金

The Sensitization of Cupric Ion to the Polarographic Adsorptive Wave of RE-DBF-Chlorophosphonazo System

YAN Rong, SHI Wen-Zhao   

  1. National Lab. on Combustion, Dept.of Chem., Huazhong Univ.of Science and Technology, Wuhan, 430074
  • Received:1993-02-18 Revised:1993-09-10 Online:1994-02-24 Published:1994-02-24

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关键词: 稀土(Ⅲ), 铜(Ⅱ), DBF-偶氮氯膦, 极谱吸附波, 增敏

Abstract: It was presented that the sensitization of cupric ion to the polarographic adsorptive wave of RE-DBF-CPAsystem in this paper.The peak current of PAWcan be increased about 10 times in the solution of 0.1 mol/L NH4Cl in the presence of more than 1.0 mg Cu(Ⅱ) ion.Therefore, it has been established that a sensitive and selective method for determination of trace RE.The linear range is 1.43×10-9-3.0×10-8(RE)mol/L, the detection limit is 7.1×10-10(RE) mol/L.This method has been used to determine trace REin several sample of leaves.The mechanism of sensitization of Cu(Ⅱ) ion to this system has been investigated preliminarily.

Key words: Rare earth(Ⅲ), Cu(Ⅱ), DBF-CPA, PAW, Sensitization

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