Electrochemical Sensing of Anions and Heparin by an Alkyl-chain Ferrocene Cationic Surfactant

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  • KATO Ryo
    Cooperative Research Facility Center, Toyohashi University of Technology
  • SATO Akihiko
    Department of Materials Science, Toyohashi University of Technology
  • YOSHINO Daisuke
    Department of Materials Science, Toyohashi University of Technology
  • HATTORI Toshiaki
    Department of Electric and Electronic Information Engineering, Toyohashi University of Technology

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Abstract

Alkyl-chain ferrocene cationic surfactants (ACFcCS) can form ion-pair complexes with anions, and are then adsorbed at hydrophobic electrode surfaces or extracted to organic layers. The amount of adsorbed ACFcCS-anion complex is dependent on the anion concentration in a solution, and the anion concentration can be determined from the current intensity of the oxidation wave of the ferrocene part of ACFcCS. In this work, we studied the adsorption behavior of (ferrocenylmethyl)dodecyldimethyl ammonium ion (FcMDDMA) on a carbon-paste electrode, which accompanies the ion-pair formation with an inorganic anion, an organic anion, or heparin molecule. A concentration analysis of a heparin sodium injection sample was carried out using adsorption voltammetry, and the amperometric titration used FcMDDMA as the end-point indicator.

Journal

  • Analytical Sciences

    Analytical Sciences 27 (1), 61-66, 2011

    The Japan Society for Analytical Chemistry

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