Differential Pulse Voltammetric Determination of Iron(III) Ion with a Sodium Dodecyl Sulfate Modified Glassy Carbon Electrode

Ko, Young Chun; 고영춘; Kim, Jin Ah; 김진아; Chung, Keun Ho; 정근호

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P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

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P-ISSN 1225-0163
E-ISSN 2288-8985

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Vol.10, No.6

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Differential Pulse Voltammetric Determination of Iron(III) Ion with a Sodium Dodecyl Sulfate Modified Glassy Carbon Electrode

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

1997, v.10 no.6, pp.427-432

Ko, Young Chun
Kim, Jin Ah
Chung, Keun Ho

Ko, Y. C., Kim, J. A., & Chung, K. H. (1997). Differential Pulse Voltammetric Determination of Iron(III) Ion with a Sodium Dodecyl Sulfate Modified Glassy Carbon Electrode. , 10(6), 427-432.

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Abstract

A selective method for the determination of iron(III) ion with a sodium dodecyl sulfate(SDS) modified glassy carbon electrode was proposed. It was based on the electrostatic attraction and complexation of the SDS modifier, $(DS^-)_n-Fe^{3+}$. The determination of iron(III) ion was performed by a differential pulse voltammetry(DPV), and the reduction peak potential of $(DS^-)_n-Fe^{3+}$ was +0.466(${\pm}0.002$)V vs. Ag/AgCl. For the determination of iron(III) ion, a linear calibration curve was obtained within the iron(III) ion concentration range of $0.50{\times}10^{-5}{\sim}10{\times}10^{-5}mol/L$, and the detection limit was $0.14{\times}10^{-5}mol/L$. $Cu^{2+}$, $Ni^{2+}$, $Co^{2+}$, $Pb^{2+}$, $Zn^{2+}$, and $Mn^{2+}$ showed little or no effect on the determination of iron(III) ion, respectively. But, ion such as each $CN^- $ and $SCN^-$ interfered seriously.

keywords: chemically modified electrode, determination of iron(III) ion, differential pulse voltammetry, sodium dodecyl sulfate modified glassy carbon electrode