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Graphite‐Polyurethane and Graphite‐Silicone Rubber Composite Electrodes for Electrochemical Characterization and Determination of Minoxidil

Sousa, Rogerio A. et al.

Electroanalysis. Volume 25:Issue 3 (2013, March); pp 706-715 -- Wiley-VCH

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  • Title:
    Graphite‐Polyurethane and Graphite‐Silicone Rubber Composite Electrodes for Electrochemical Characterization and Determination of Minoxidil
  • Author: Sousa, Rogerio A.;
    Dos‐Santos, Sidney X.;
    Cavalheiro, Eder T. G.;
    Brett, Christopher M. A.
  • Found In: Electroanalysis. Volume 25:Issue 3 (2013, March); pp 706-715
  • Journal Title: Electroanalysis
  • Subjects: Chemistry, Analytical--Periodicals; Electrochemistry--Periodicals; Electrochemical analysis--Periodicals; Dewey: 543.4
  • Rights: legaldeposit
  • Publication Details: Wiley-VCH
  • Abstract: Abstract

    Graphite‐polyurethane (GPUE) and graphite‐silicone rubber (GSRE) electrodes have been used for oxidative determination of the vasodilator minoxidil in pharmaceutical samples and in plasma and urine electrolyte solutions. The electrooxidation process at 0.840 V (GPUE) and 0.860 V (GSRE) vs. SCE was characterized over a wide pH range by cyclic voltammetry and electrochemical impedance spectroscopy. Quantification using cyclic, differential pulse, and square‐wave voltammetry, gave results agreeing with high pressure liquid chromatography, that has similar micromolar detection limits, but with a simpler analytical procedure. Advantages of these composite electrodes are non‐adsorption of analyte or oxidation products, a long useful life and robustness.


  • Identifier: ETOClsidyv873b33cc; System Number: LDEAvdc_100024723963.0x000001; Journal ISSN: 1040-0397; 10.1002/elan.201200606
  • Publication Date: 2013
  • Physical Description: Electronic
  • Shelfmark(s): ELD Digital store

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