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- 주제어 : Poly (Evans blue) (검색결과 1 건)
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Ge, Chuang-ye,Rahman, Md. Mahbubur,Li, Xiao-bo,Lee, Jae-Joon The Electrochemical Society 2016 Journal of the Electrochemical Society Vol.163 No.10
<P>A simple and sensitive electrochemical sensor for the simultaneous detection of hydroquinone (HQ) and catechol (CT) is developed based on a poly (Evans blue) (PEB)-modified anodized glassy carbon electrode (AGCE). The PEB/AGCE sensor shows excellent electrocatalytic activity and reversibility toward the oxidation of both HQ and CT in phosphate buffer solution (PBS, pH 7.0). Both AGCE and PEB/AGCE can easily resolve the redox responses of HQ and CT from their mixture solution with the same peak-to-peak potential (Delta Ep) separations of ca. 0.10 V, whereas bare GCE cannot resolve them. The PEB/AGCE sensor exhibits significantly higher sensitivity with a linear dynamic range 1-100 mu M for both HQ and CT. Furthermore, the sensor shows detection limits (S/N = 3) of ca. 0.13 and 0.12 mu M for HQ and CT, respectively, with sensitivities of ca. 1.01 and 0.95 mu A/cm(2)/mu M, respectively. The sensor does not exhibit any significant interference for the detection of HQ and CT in the presence of common interferences. This study provides a simple and sensitive method with excellent recoveries for the simultaneous and quantitative determination of HQ and CT from tap water. (C) 2016 The Electrochemical Society. All rights reserved.</P>
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