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- W2079490844 abstract "Pretreatment of glassy carbon (GC) electrodes with 2-propanol, acetonitrile, or cyclohexane had a significant effect on electrode kinetics, adsorption, and capacitance. Reagent grade solvents slowed electron transfer rates for dopamine, ascorbic acid, Fe3+/2+, and Fe(CN)63-/4- and decreased adsorption of anthraquinone-2,6-disulfonate (AQDS) and methylene blue (MB). However, if activated carbon (AC) was present in the solvent during pretreatment, the result was increased electron transfer rates and adsorption for several commonly studied redox systems. The large surface area of AC acts as a “getter” for solvent impurities and for species desorbed from the GC surface, leading to a carbon electrode surface with higher capacitance, higher adsorption of AQDS and MB, and faster electron-transfer rates for Fe(CN)63-/4-, dopamine, and ascorbic acid. In addition, the treated surfaces were more reproducible, and aged electrodes were reactivated by AC in 2-propanol. The results imply that large, polar organic impuri..." @default.
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- W2079490844 date "1999-07-03" @default.
- W2079490844 modified "2023-09-30" @default.
- W2079490844 title "Facile Preparation of Active Glassy Carbon Electrodes with Activated Carbon and Organic Solvents" @default.
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- W2079490844 doi "https://doi.org/10.1021/ac981386n" @default.
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