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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,
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. Analytical Science and Technology, 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, <TEX>$(DS^-)_n-Fe^{3+}$</TEX>. The determination of iron(III) ion was performed by a differential pulse voltammetry(DPV), and the reduction peak potential of <TEX>$(DS^-)_n-Fe^{3+}$</TEX> was +0.466(<TEX>${\pm}0.002$</TEX>)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 <TEX>$0.50{\times}10^{-5}{\sim}10{\times}10^{-5}mol/L$</TEX>, and the detection limit was <TEX>$0.14{\times}10^{-5}mol/L$</TEX>. <TEX>$Cu^{2+}$</TEX>, <TEX>$Ni^{2+}$</TEX>, <TEX>$Co^{2+}$</TEX>, <TEX>$Pb^{2+}$</TEX>, <TEX>$Zn^{2+}$</TEX>, and <TEX>$Mn^{2+}$</TEX> showed little or no effect on the determination of iron(III) ion, respectively. But, ion such as each <TEX>$CN^- $</TEX> and <TEX>$SCN^-$</TEX> interfered seriously.
- keywords
- chemically modified electrode, determination of iron(III) ion, differential pulse voltammetry, sodium dodecyl sulfate modified glassy carbon electrode
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