Flow injection analysis of sulphide based on its photoelectrocatalytic oxidation at poly-methylene blue modified glassy carbon electrode

Dilgin, Yusuf; Canarslan, Seda; Ayyıldız, Önder; Ertek, Bensu; Nişli, Gürel

doi:10.1016/j.electacta.2012.01.072

Cited by 23 publications

(14 citation statements)

References 47 publications

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“…However, the LOD of the proposed method was the same as that obtained from the quercetin modified PGE; the linearity range of the quercetin modified PGE was better than that of PB/GCE. While the photoelectrocatalytic detection of sulfide in the FIA system using poly-MB modified GCE 22 shows the same DP potential as the proposed method, its linearity range and LOD were better than that of the proposed method.…”

Section: Amperometric Detection Of Sulfide In Flow-injection Systemmentioning

confidence: 94%

“…a) bare GCE and b) PB/GCE (0.05 mM injected sulfide). obtained from PB/GCE, were compared with results obtained from our previous studies using MB, 22 quercetin 23 and hematoxylin. 24 Although quercetin and hematoxylin modified pencil graphite electrodes (PGEs) allow a disposable, low cost, renewable sensor for sulfide determination, the electrocatalytic detection potential (DP) of sulfide at PB/GCE was found to be more negative than the DP of sulfide at quercetin and hematoxylin modified PGEs.…”

Section: Amperometric Detection Of Sulfide In Flow-injection Systemmentioning

confidence: 99%

“…22 From these optimal conditions, amperometric currents vs. various concentrations of sulfide were also obtained using PB/GCE. Figure 6 shows current-time curves for the amperometric FIA responses at various concentrations of sulfide.…”

Section: Amperometric Detection Of Sulfide In Flow-injection Systemmentioning

confidence: 99%

“…Recently, our research has considered electrocatalytic effects of some redox mediators towards sulfide oxidation; such as methylene blue (MB), 22 quercetin 23 and hematoxylin 24 showed significant enhancement of sensitive and reliable response of sulfide.…”

Section: Introductionmentioning

confidence: 99%

“…Electrochemical techniques, however, have some advantages, such as easy application, lower cost and providing direct, sensitive and fast detection of lower concentrations of H2S. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] The direct electrochemical oxidation of sulfide is highly irreversible with a great overpotential at bare electrodes. Additionally, the oxidized products of sulfide can be adsorbed on the electrode surface, which may result in fouling and passivation of the electrode surface, leading to poor sensitivity, poor selectivity and unstable analytical signals.…”

Section: Introductionmentioning

confidence: 99%

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Flow Injection Amperometric Detection of Sulfide Using a Prussian Blue Modified Glassy Carbon Electrode

Ertek

Červenka

et al. 2012

ANAL. SCI.

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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.

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Section: Amperometric Detection Of Sulfide In Flow-injection Systemmentioning

confidence: 94%

Section: Amperometric Detection Of Sulfide In Flow-injection Systemmentioning

confidence: 99%

Section: Amperometric Detection Of Sulfide In Flow-injection Systemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Flow Injection Amperometric Detection of Sulfide Using a Prussian Blue Modified Glassy Carbon Electrode

Ertek

Červenka

et al. 2012

ANAL. SCI.

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Fabrication of Photoelectrochemical Glucose Biosensor in Flow Injection Analysis System Using ZnS/CdS‐Carbon Nanotube Nanocomposite Electrode

Sağlam

Dilgin

2017

Electroanalysis

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In this work, a photoamperometric glucose biosensor based on glucose oxidase (GODx) was developed in flow injection analysis (FIA) system using ZnS‐CdS quantum dot (QD) modified multiwalled carbon nanotube/glassy carbon electrode (ZnS‐CdS/MWCNT/GCE). Cyclic voltammograms of the proposed electrode (GODx/ZnS‐CdS/MWCNT/GCE) showed a pair of well‐defined reversible redox peak attributing that direct electron transfer between the protein and electrode. The current of the reduction peak became more cathodic in the presence of O2 due to the electrocatalytic activity of the electrode towards the reduction of dissolved O2, but reduction current shifted to a less negative value upon addition of glucose in the solution. The obtained CV currents were affected by the irradiation of the electrode surface. Thus, the photoelectrochemical biosensing of glucose in the FIA system was studied by monitoring of the changes in the electrocatalyzed reduction peak current of dissolved O2 at the proposed electrode dependent on glucose concentration. The proposed photoelectrochemical FIA method has a linear response to glucose ranging from of 0.01 to 1.0 mM with detection limit of 3.0 μM under optimized conditions. Photoelectrochemical biosensor was successfully fabricated in FIA system for selective, sensitive and repeatable detection of glucose and has been satisfactorily applied to determination of glucose in real sample.

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Recent advances in electrochemical detection of important sulfhydryl-containing compounds

Zlámalová

Nesměrák

2016

Monatsh Chem

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Flow injection analysis of sulphide based on its photoelectrocatalytic oxidation at poly-methylene blue modified glassy carbon electrode

Cited by 23 publications

References 47 publications

Flow Injection Amperometric Detection of Sulfide Using a Prussian Blue Modified Glassy Carbon Electrode

Flow Injection Amperometric Detection of Sulfide Using a Prussian Blue Modified Glassy Carbon Electrode

Fabrication of Photoelectrochemical Glucose Biosensor in Flow Injection Analysis System Using ZnS/CdS‐Carbon Nanotube Nanocomposite Electrode

Recent advances in electrochemical detection of important sulfhydryl-containing compounds

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