Determination of Iodine Ion by Differential Pulse Anodic Stripping Voltammetry

Abstract

Abstract: I-may be oxidized to form IO₃^-.On this basis The determination of iodine ion by dif-ferential pulse anodic st ripping voltammetry(DPAS)on Pt ball work Electrode was investigated. For overcoming The absorption of IO₃^-, The Electrode was washed by Electrochemical method(at+1.3 V)for 120s.This method can detect 5.00×10^-7mol/L I^-in 0.1 mol/L KH₂PO₄₂K₂HPO₄buffer solution(pH=4).Agood proportionality between The peak currentof DPAS and iodineion concent ration in The range of 5.00×10^-7～1.50×10^-5mol/L has been observed. This met hod was successf ully applied to determination of iodine in kelp and edible salt.

Key words: Differential pulse anodic stripping voltammetry, Iodine, Kelp, Edible salt

CLC Number:

O657.1

TrendMD:

TIAN Yuan, SONG Wen-Bo, JIANG Yan-Xia, LIU Ying, CHEN Xu, XU Hong-Ding. Determination of Iodine Ion by Differential Pulse Anodic Stripping Voltammetry[J]. Chem. J. Chinese Universities, 1999, 20(1): 28.

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Determination of Iodine Ion by Differential Pulse Anodic Stripping Voltammetry

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