Conductive poly(bromophenol red) film coated graphene oxide-ZnO nanocomposite modified electrode for enzymeless voltammetric determination of ethyl-paraoxon

KARAKAYA S., Demir C., Zaman B. T., BAKIRDERE S., DİLGİN Y.

Journal of Food Composition and Analysis, cilt.141, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 141
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.jfca.2025.107393
  • Dergi Adı: Journal of Food Composition and Analysis
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Analytical Abstracts, BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Food Science & Technology Abstracts, Veterinary Science Database
  • Anahtar Kelimeler: Ethyl-paraoxon, Graphene oxide-ZnO nanocomposite, Pesticide, Poly(Bromophenol red), Synergistic effect, Voltammetry
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

This work proposes a sensitive and nonenzymatic electrochemical platform for the cyclic voltammetric determination of ethyl-paraoxon (E-POX) at a poly-bromophenol red (poly(BPR) film coated graphene oxide (GO) and ZnO nanocomposite modified glassy carbon electrode (poly(BPR)@GO-ZnO/GCE). The incorporation of poly(BPR) matrix with GO-ZnO nanocomposite provides a considerable synergistic effect for the voltammetric determination of E-POX by providing a large surface area, more active sites, and high conductivity. The results showed that the poly(BPR)@GO-ZnO/GCE exhibits two linear response ranges from 0.10–3.0 µM and 5.0–200 µM with a limit of detection (LOD) of 31 nM and a high sensitivity of 5259 μA mM−1 cm−2. Real-world applicability of designed platform was successfully tested in agricultural (tomato and cucumber) and tap water samples, and acceptable recovery values (98.1–114.2 %) were obtained. It is concluded that the proposed platform (poly(BPR), GO, and ZnO) may bring remarkable approaches to the future fabrication of electrochemical sensors.