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

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (2): 195.

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

YAN Rong, SHI Wen-Zhao

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

Abstract

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

TrendMD:

YAN Rong, SHI Wen-Zhao. The Sensitization of Cupric Ion to the Polarographic Adsorptive Wave of RE-DBF-Chlorophosphonazo System[J]. Chem. J. Chinese Universities, 1994, 15(2): 195.

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

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