Pyrocatechol violet modified graphite pencil electrode for flow injection amperometric determination of sulfide


Journal of Electrochemical Science and Technology, vol.11, no.3, pp.248-256, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 3
  • Publication Date: 2020
  • Doi Number: 10.33961/jecst.2019.00605
  • Journal Name: Journal of Electrochemical Science and Technology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.248-256
  • Keywords: Graphite Pencil Electrode, Pyrocatechol Violet, Electrocatalytic Oxidation, Sulfide, Flow Injection Analysis, GLASSY-CARBON ELECTRODE, ELECTROCATALYTIC OXIDATION, FILM, NANOTUBES, HYDRAZINE, NANOPARTICLES, GLUCOSE
  • Çanakkale Onsekiz Mart University Affiliated: Yes


© 2020, Korean Electrochemical Society. All rights reserved.In this study, pyrocatechol violet (Pcv) is proposed for the first time as an efficient electrocatalyst for oxidation of sulfide and flow injection analysis (FIA) of sulfide. A graphite pencil electrode (GPE) was modified with Pcv via immersion of the GPE into 0.01 M Pcv solution for 15 min. Cyclic voltammograms (CVs) demonstrated that Pcv/GPE exhibits a good electrocatalytic performance due to shift in the potential from +400 at bare GPE to +70 mV at Pcv/GPE and obtaining an enhancement in the peak current compared with the bare GPE. A linear range between 0.25 and 250 µM sulfide with a detection limit of 0.07 µM was obtained from the recorded current-time curves in Flow Injection Analysis (FIA) of sulfide. Sulfide in water samples was also successfully determined using the proposed FI amperometric methods.