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STUDY ON THE POLAROGRAPHIC ADSORPTIVE WAVE OF THE COMPLEX OF ANTIMONY(III)-TIRON-CTMAB SYSTEM

Qiaoling Zhao

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Abstract

In a medium of 0.04mol·L -1 H 3PO 4, antimony(Ⅲ) reacts with tiron and CTMAB to form a ternary complex, which shows a sharp wave on the dropping mercury electrode at the peak potential of -0.44V(vs.SCE). The second derivative peak height keeps a linear relation ship with the concentration of antimony(Ⅲ) in the range of 8.2×10 -10～2×10 -6mol·L -1, and the detection limit is 4×10 -10mol·L -1. A comparative study on the mechanism of the electrode reaction and on the properties of the polarographic adsorptive wave of the complex was made by several electrochemical methods. The method has been used in the determination of antimony in arsenous oxide and copper alloy with satisfactory results.

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In a medium of 0.04mol·L -1 H 3PO 4, antimony(Ⅲ) reacts with tiron and CTMAB to form a ternary complex, which shows a sharp wave on the dropping mercury electrode at the peak potential of -0.44V(vs.SCE). The second derivative peak height keeps a linear relation ship with the concentration of antimony(Ⅲ) in the range of 8.2×10 -10～2×10 -6mol·L -1, and the detection limit is 4×10 -10mol·L -1. A comparative study on the mechanism of the electrode reaction and on the properties of the polarographic adsorptive wave of the complex was made by several electrochemical methods. The method has been used in the determination of antimony in arsenous oxide and copper alloy with satisfactory results.

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Available abstract

In a medium of 0.04mol·L -1 H 3PO 4, antimony(Ⅲ) reacts with tiron and CTMAB to form a ternary complex, which shows a sharp wave on the dropping mercury electrode at the peak potential of -0.44V(vs.SCE). The second derivative peak height keeps a linear relation ship with the concentration of antimony(Ⅲ) in the range of 8.2×10 -10～2×10 -6mol·L -1, and the detection limit is 4×10 -10mol·L -1. A comparative study on the mechanism of the electrode reaction and on the properties of the polarographic adsorptive wave of the complex was made by several electrochemical methods. The method has been used in the determination of antimony in arsenous oxide and copper alloy with satisfactory results.

Key concepts: Antimony, Tiron, Polarography, Chemistry, Electrochemistry, Ternary operation, Electrode, Detection limit

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STUDY ON THE POLAROGRAPHIC ADSORPTIVE WAVE OF THE COMPLEX OF ANTIMONY(III)-TIRON-CTMAB SYSTEM — Research Paper | ScholarLens