Voltammetric Behaviour of Sulfamethoxazole on Electropolymerized-Molecularly Imprinted Overoxidized Polypyrrole

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Oezkorucuklu S. P., ŞAHİN Y., Alsancak G.

SENSORS, cilt.8, sa.12, ss.8463-8478, 2008 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 8 Sayı: 12
  • Basım Tarihi: 2008
  • Doi Numarası: 10.3390/s8128463
  • Dergi Adı: SENSORS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.8463-8478
  • Anahtar Kelimeler: Molecularly imprinted polymer, overoxidized polypyrrole, pencil graphite electrode, electropolymerization, sulfamethoxazole, sulfonamides, SOLID-PHASE EXTRACTION, PERFORMANCE LIQUID-CHROMATOGRAPHY, PENCIL GRAPHITE ELECTRODE, ELECTROCHEMICAL PREPARATION, QUANTITATIVE-DETERMINATION, SULFONATED POLYPYRROLE, AMPEROMETRIC DETECTION, CONDUCTING POLYMER, FILMS, SULFONAMIDES
  • Yıldız Teknik Üniversitesi Adresli: Hayır

Özet

In this work, preparation of a molecularly imprinted polymer (MIP) film and its recognition properties for sulfamethoxazole were investigated. The overoxidized polypyrrole (OPPy) film was prepared by the cyclic voltammetric deposition of pyrrole (Py) in the presence of supporting electrolyte (tetrabutylammonium perchlorate-TBAP) with and without a template molecule (sulfamethoxazole) on a pencil graphite electrode (PGE). The voltammetric behaviour of sulfamethoxazole on imprinted and non-imprinted (NIP) films was investigated by differential pulse voltammetry (DPV) in Britton-Robinson (BR) buffer solutions prepared in different ratio of acetonitrile-water binary mixture, between the pH 1.5 and 7.0. The effect of the acetonitrile-water ratio and pH, monomer and template concentrations, electropolymerization cycles on the performance of the MIP electrode was investigated and optimized. The MIP electrode exhibited the best reproducibility and highest sensitivity. The results showed that changing acetonitrile-water ratio and pH of BR buffer solution changes the oxidation peak current values. The highest anodic signal of sulfamethoxazole was obtained in BR buffer solution prepared in 50% (v/v) acetonitrile- water at pH 2.5. The calibration curve for sulfamethoxazole at MIP electrode has linear region for a concentration range of 25.10(-3) to 0.75 mM (R-2=0.9993). The detection limit of sulfamethoxazole was found as 3.59.10(-4) mM (S/N=3). The same method was also applied to determination of sulfamethoxazole in commercial