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- W2020997450 abstract "Solid carbon composite electrodes (CCEs) prepared by copper(I) oxide (Cu2O) dispersed in polyethylene and graphite powder have been investigated for use as working electrode in amperometric flow-through detection in alkaline solutions. The effects of matrix composition, electrocatalyst loading, short- and long-term electrode stability, noise current, and sensitivity were assessed using d-mannitol as a model compound. Excellent sensitivity accompanied by a low residual current was observed with a 50% (w/w) Cu2O loading level in the carbon paste matrix. An estimate value of the double layer capacitance, evaluated by cyclic voltametry in 0.48 M NaOH, was about 1360 μF/mm2. Upon optimizing the sensing electrode in terms of composite electrode formulation, hydroxide ion concentration, and operating potential, the detection limit for d-mannitol in flow injection mode, using a wall-jet flow cell, was 5 μM for 50 μl injections. The bulk Cu2O-CCEs exhibit good mechanical stability under forced flow hydrodynamic conditions, and overall offers the advantage of a very low background current. An additional inherent feature of these catalyst-modified electrodes is their renewal capability; the surface can rapidly be renewed by a simple polishing procedure making the amperometric sensor very attractive for routine quantitative measurements." @default.
- W2020997450 created "2016-06-24" @default.
- W2020997450 creator A5026683813 @default.
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- W2020997450 date "1996-06-01" @default.
- W2020997450 modified "2023-10-18" @default.
- W2020997450 title "Development of a carbon composite electrode made from polyethylene and graphite powder modified with copper(I) oxide" @default.
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- W2020997450 doi "https://doi.org/10.1016/0003-2670(96)00054-2" @default.
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