Electrooxidation of the antiviral drug valacyclovir and its square-wave and differential pulse voltammetric determination in pharmaceuticals and human biological fluids
ANALYTICA CHIMICA ACTA, cilt.555, sa.2, ss.341-347, 2006 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 555 Sayı: 2
- Basım Tarihi: 2006
- Doi Numarası: 10.1016/j.aca.2005.09.034
- Dergi Adı: ANALYTICA CHIMICA ACTA
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.341-347
- Van Yüzüncü Yıl Üniversitesi Adresli: Hayır
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.