Fourier Analysis of AC Polarography. Elimination of Non-Faradaic Effects and Determination of Kinetic Parameters for Cd(II)-Na<SUB>2</SUB>SO<SUB>4</SUB> System
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概要
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The on-line Fourier analysis of the AC polarographic current was found to give accurate results for electrode kinetics provided that the compensation of the <I>iR</I> drop and of the non-faradaic current was attained: The <I>iR</I> drop was compensated by a <I>positive feedback technique</I>. The charging current was cancelled by addition of a <I>pseudo-charging current</I>, inverse in phase to the former. Both the phase angles and amplitudes of the fundamental and second harmonic AC responses for the system of Pb(II) in 1M NaClO<SUB>4</SUB> ([H<SUP>+</SUP>]=12 mM) agreed with theoretical prediction. As an illustration, the kinetic parameters of Cd(II)-1 N Na<SUB>2</SUB>SO<SUB>4</SUB> system have been determined to be <I>k</I><SUB>s</SUB>=(0.20±0.03) cm/s and α=0.30 (0.27<0.30<0.35) from the second harmonic AC polarogram.
- 公益社団法人 日本化学会の論文
著者
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Umezawa Yoshio
Department Of Chemistry Faculty Of Sciences The Tokyo University
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Fujiwara Shizuo
Department Of Chemistry Faculty Of Science Chiba University
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Umezawa Yoshio
Department of Chemistry, Faculty of Science, University of Tokyo
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Kojima Hiroyuki
Department of Chemistry, Faculty of Science, The University of Tokyo
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Kojima Hiroyuki
Department of Chemistry, Faculty of Science, University of Tokyo
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Hirota Michio
Department of Chemistry, Faculty of Science, University of Tokyo
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Hirota Michio
Department of Chemistry, Faculty of Science, The University of Tokyo
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