Pyrocatechol Violet Modified Graphite Pencil Electrode for Flow Injection Amperometric Determination of Sulfide


Emir G., KARAKAYA S. , DİLGİN Y.

JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY, cilt.11, no.1, ss.248-256, 2020 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 11 Konu: 3
  • Basım Tarihi: 2020
  • Doi Numarası: 10.33961/jecst.2019.00605
  • Dergi Adı: JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY
  • Sayfa Sayıları: ss.248-256

Özet

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 mu M sulfide with a detection limit of 0.07 mu M 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.