title: Flow injection amperometric detection of sulfide using a prussian blue modified glassy carbon electrode.
abstract: This study investigates a new approach for the electrocatalytic determination of sulfide in a flow injection analysis (FIA) system using a Prussian blue modified glassy carbon electrode (PB/GCE). The results from experiments show that PB/GCE significantly enhances the electrocatalytic activity towards sulfide oxidation. A homemade flow electrochemical cell was used to perform the electrocatalytic determination of sulfide in the FIA system. The currents obtained from amperometric measurements in the FIA system at optimum conditions (carrier solution, pH 8.0; Britton-Robinson buffer solution containing 0.1 M KCl; flow rate, 1.4 mL/min; transmission tubing length, 10 cm; injection volume, 100 μL; constant applied potential, +150 mV vs. Ag/AgCl/KClsat) were linearly correlated with the sulfide concentration. A calibration curve was obtained for sulfide concentrations in the range of 0.5 - 100 μM. The detection limit was found to be 0.3 μM for the amperometric method. The proposed method was successfully applied to wastewater sample. Finally, results from sulfide measurements by PB/GCE were in good agreement with those obtained from the spectrophotometric method.
authors.affiliation: Canakkale Onsekiz Mart University, Science & Art Faculty, Department of Chemistry, Turkey.
authors.forename: Bensu
authors.initials: B
authors.lastname: Ertek
authors.forename: Dai Long
authors.initials: DL
authors.lastname: Vu
authors.forename: Libor
authors.initials: L
authors.lastname: Cervenka
authors.forename: Yusuf
authors.initials: Y
authors.lastname: Dilgin
mesh_terms: D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D055664:Electrochemical Techniques; D004566:Electrodes; D005295:Ferrocyanides / Q000737:chemistry*; D017022:Flow Injection Analysis; D005898:Glass / Q000737:chemistry; D013440:Sulfides / Q000032:analysis*; D013499:Surface Properties; D014874:Water Pollutants, Chemical / Q000737:chemistry
chemical_list: D005295:Ferrocyanides; D013440:Sulfides; D014874:Water Pollutants, Chemical; D002244:Carbon; C000170:ferric ferrocyanide