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Ežerskis, Z.; Jusys, Z.

doi:10.1023/a:1016548627078

Cited by 32 publications

(27 citation statements)

References 16 publications

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“…The decrease in peak current with increasing DCP concentration is probably due to the formation of polymeric film on the electrode surface. Similar electrode passivation during the electro-oxidation of many chlorophenols has been reported by earlier researchers [5,15]. The anodic peak current decreases slightly with increasing concentration in the case of TCP between 10 and 20 mM ( Fig.…”

Section: Voltammetric Studiessupporting

confidence: 84%

“…In addition to biodegradation [1] and photo degradation methods [2], many electrochemical studies have also been reported in the past decade. Ezerkis and co-workers have studied the electro-polymerization behavior of chlorophenols using voltammetry [3], galvanostatic oxidation [4], GC-MS [5], and other spectroscopic techniques [6] using platinum anode. Glassy carbon electrode (GC) [7], iron oxide [8], and nickel phthalocyanine modified electrodes [9] have also been employed for a more detailed surface analysis using cyclic voltammetry, XPS, AFM, and impedance techniques [10].…”

Section: Introductionmentioning

confidence: 99%

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Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification

2009

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The voltammetric behavior of 2, 4-dichlorophenol (DCP), 2, 4, 6-trichlorophenol (TCP) and pentachlorophenol (PCP) in aqueous sodium hydroxide (NaOH), aqueous NaOH-sodium dodecylsulphate (SDS) micellar solution and SDS/n-hexane/n-butanol/water microemulsion on glassy carbon electrode (GC) is reported. In aqueous alkaline medium, the electrode fouling is significant. Among the three media, the electrode fouling is the minimum in aqueous microemulsion. The fouling effect also depends on the nature of the phenolic compound. DCP exhibits the maximum fouling effect, and PCP exhibits the minimum fouling effect. During oxidation of the TCP in the microemulsion, quinone-hydroquinone-like redox couples were formed on the electrode surface. Reproducible voltammetric responses without electrode fouling could be obtained for all the three phenolic compounds up to 20 mM concentrations in microemulsion. In the galvanostatic oxidation in NaOH media, DCP and TCP led to formation of polymeric films on the glassy carbon surface. The Average molecular weight of the polymer obtained is in the range of 7,500-9,500. Even 2.5% by weight of chlorophenols could be oxidized under galvanostatic conditions in microemulsions without significant fouling.

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Section: Voltammetric Studiessupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification

2009

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“…It can be expected the bromophenoxy radicals, formed in the first oxidation step, react to form the dimeric products as it was reported for chlorophenols [27,30].…”

Section: Resultsmentioning

confidence: 58%

“…The electrochemical oxidation of halogenated phenols involves the generation of radicals followed by oligomeric or polymeric compounds formation [27,28]. The course of electrochemical oxidation depends on various experimental conditions such as solvent-electrolyte system, electrode potential, phenol concentration, pH, electrode material, the number of halogen atoms and their position in an aromatic ring [28,29].…”

Section: Introductionmentioning

confidence: 99%

“…Electrooxidation of chlorophenols (CPs) was thoroughly investigated particularly in aqueous solutions [28,[30][31][32][33][34][35][36][37]. The formation of ether-type oligomeric or polymeric products prevails in alkaline pH [30,31,34,36] while carbon-carbon coupling is more common in acidic solutions [27]. The oligomeric/polymeric compounds form a film, which covers and passivates the working electrode surface [30-32, 35, 37].…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical oxidative dimerization of monobrominated phenols and pentabromophenol in methanol-aqueous media

et al. 2015

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The electrochemical oxidation of monobrominated phenols (2-bromophenol, 3-bromophenol, 4-bromophenol) and pentabromophenol in methanolaqueous solutions (1:1 and 9:1, v/v) was studied by cyclic voltammetry on glassy carbon electrode in static and rotating disc arrangement. First oxidation step was followed by dimerization reaction resulting in formation of electroactive species. Products of controlled potential electrolysis of bromophenols on the platinum gauze electrode were analysed by ultra-performance liquid chromatography/time of flight mass spectrometry and by gas chromatography/mass spectrometry. C-C and C-O-C linked dimers were found as the main oxidation products in monobrominated phenols solutions electrolysed under mild conditions. Pentabromophenol provided a dimer with C-O-C linkage. On-line coupling of mass spectrometry with electrochemical flow-through cell (EC/MS) containing platinum working electrode proved formation of dimers in the case of 2-bromophenol and 4-bromphenol.Graphical abstract

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Electrochemical Detection of Steroid Hormones Using a Nickel‐Modified Glassy Carbon Electrode

et al. 2014

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This paper demonstrates the development of an analytical method for detecting steroid hormones by coupling HPLC to electrochemical detection, using a nickel‐modified glassy carbon electrode. The method was evaluated in terms of sensitivity, linear dynamic range, limit of detection, and response stability. The developed method exhibited good figures of merit for the steroid hormones studied with no evidence of electrode fouling. As an example, the limit of detection (S/N=3) for E3 was 0.10 µM and the response precision (n=5) was 0.6 %. The application of the method for the analysis of a real river water sample is demonstrated.

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Cited by 32 publications

References 16 publications

Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification

Anodic oxidation of chlorophenols in micelles and microemulsions on glassy carbon electrode: the medium effect on electroanalysis and electrochemical detoxification

Electrochemical oxidative dimerization of monobrominated phenols and pentabromophenol in methanol-aqueous media

Electrochemical Detection of Steroid Hormones Using a Nickel‐Modified Glassy Carbon Electrode

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