Electrooxidation of the antiviral drug valacyclovir and its square-wave and differential pulse voltammetric determination in pharmaceuticals and human biological fluids


USLU B. A. , OZKAN S., Senturk Z.

ANALYTICA CHIMICA ACTA, cilt.555, ss.341-347, 2006 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 555 Konu: 2
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.aca.2005.09.034
  • Dergi Adı: ANALYTICA CHIMICA ACTA
  • Sayfa Sayıları: ss.341-347

Özet

The electrochemical properties of valacyclovir, an antiviral drug, were investigated in pH range 1.8-12.0 by cyclic, differential pulse and square-wave voltammetry. The drug was irreversibly oxidized at a glassy carbon electrode in one or two oxidation steps, which are pH-dependent. For analytical purposes, a very resolved diffusion controlled voltammetric peak was obtained in Britton-Robinson buffer at pH 10.0 using differential pulse and square-wave modes. Limits of detection were 1.04 x 10(-7) and 4.60 x 10(-8) M for differential pulse and square-wave voltammetry, respectively. The applicability to direct assays of tablets, spiked human serum and simulated gastric fluid, was described. (c) 2005 Elsevier B.V. All rights reserved.