Electrooxidation of 2,4-dichlorophenol and other polychlorinated phenols at a glassy carbon electrode

Anodic oxidation of parabens in acetic acid–acetonitrile solutions

“…The peaks in the next cycles gradually achieved a stable height. Since the anodic oxidation of parabens is diffusion controlled, the decrease in peak current probably results from the partial adsorption of the final products of the electrode process [44][45][46][47]. A similar decrease of the anodic peak current corresponding to the oxidation of parabens on BDD electrode in hydro-alcoholic solutions [30] and of PHB on a GC electrode in phosphate buffer solutions [47] was observed.…”

“…This indicates that the anodic oxidation of MP proceeds on the surface of the working electrode partially covered with products of this process. As the literature data suggest, the electrochemical oxidation of phenolic compounds can induce a passivation of the working electrode via deposition of a polymeric film on their surface which is formed by polymerization reactions of phenoxyl radicals [44][45][46][47]. Similar and negligible adsorption phenomena accompanying the anodic oxidation of parabens were also observed in hydro-alcoholic solutions [30].…”

“…The formation of such a product in the anodic oxidation of phenol and its derivatives has been described in literature [44][45][46]. The increased concentration of CH 3 COO -ions in the solutions tested improves the electrode process by binding the protons, and thus moving the equilibrium of this reaction in the direction of products.…”

P(o-chlorophenol–co-o-hydroxyphenol): kinetic formation studies and pH-sensor application

“…This behavior may be explained as the mixed diffusion-kinetically controlled process [20]. According to Randless [38] and Sevick [39] (relation between ipII and (v 0.5 is linear see Fig 2B) constant over the range of sweep rates, which again shows that the oxidation process is diffusioncontrolled [33,[40][41][42][43]. Increasing the temperature by 35 °C, the D diff increased by a factor of 6.…”

Molecularly imprinted solid-phase extraction and flow-injection chemiluminescence for trace analysis of 2,4-dichlorophenol in water samples

“…Therefore, it appears of great interest to design efficient and sensitive analytical methods which are able to detect trace levels of 2,4-DCP. Although the methods of detection of 2,4-DCP, such as UV spectrophotometry [8], electrooxidation of 2,4-DCP on a rotating glassy carbon (GC) disk electrode [9], and highperformance liquid chromatography [10][11][12][13] have been developed, they have disadvantages such as low sensitivity, expensive instrumentation, or tedious operation. In order to improve the sensitivity, highly sensitive chemiluminescence (CL) detection, which has a low detection limit and wide linear dynamic range, and which uses relatively simple and inexpensive instrumentation, could be used [14,15].…”