Characteristic <i>L</i>-shape Absorbance-time Curve in Indicator Reaction for the Determination of Catalyst

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  • Keiji Takahata
    Department of Materials Science, Faculty of Engineering, Ibaraki University4-12-1 Nakanarusawa, Hitachi
  • Toshimasa Nagoshi
    Department of Materials Science, Faculty of Engineering, Ibaraki University4-12-1 Nakanarusawa, Hitachi
  • Shukuro Igarashi
    Department of Materials Science, Faculty of Engineering, Ibaraki University4-12-1 Nakanarusawa, Hitachi

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Abstract

<jats:title>Abstract</jats:title> <jats:p>The simultaneous decomposition reaction of a catalyst and indicator shows the characteristic L-shape absorbance-time curve. This reaction system provides the kinetic behavior (i.e., the chemical amplification) and the equilibrium behavior. Also, it becomes possible to have a highly-sensitive determination of a catalyst without the limitation of measuring time. This new concept of sensing was realized using the 5,10,15,20-tetrakis(4-sulfophenyl)porphine (indicator) / iron-chlorophyllin complex (catalyst) / peroxomonosulfate [KHSO5] (oxidant) system and copper-phthalocyanine-tetrasulfonate / hemoglobin / KHSO5 system.</jats:p>

Journal

  • Chemistry Letters

    Chemistry Letters 26 (9), 865-866, 1997-09-01

    Oxford University Press (OUP)

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