Microporous carbon in the selective electro-oxidation of molecular biomarkers: uric acid, ascorbic acid, and dopamine

Abstract

Herein, we demonstrate the superior electrocatalytic activities of microporous carbon in the oxidation of three molecular biomarkers, ascorbic acid (AA), dopamine (DA), and uric acid (UA), which are co-present in biological fluids.

Microporous carbon for fast and simple electrochemical detection of imidacloprid insecticide in fruit and water samples

“…The pore size and surface functional groups on microporous carbon had been fully characterized in our previous work. 32,33 The size of the pores was 1.89 nm diameter on average and the specic surface area was 1270 m 3.2 Cyclic voltammetry of IMP at GCE vs. MC/GCE At a bare GCE, a reduction peak of IMP in PBS buffer pH 7.0 was observed at −1.09 V (Fig. 3).…”

“…The pore size and surface functional groups on microporous carbon had been fully characterized in our previous work. 32,33 The size of the pores was 1.89 nm diameter on average and the specific surface area was 1270 m 2 g −1 according to the Brunauer–Emmett–Teller (BET) model measured using the nitrogen adsorption–desorption isotherm. Fourier-transform infrared spectroscopy (FT-IR) revealed the presence of O–H, CO, CC, C–O, and C–C functional groups on the surface of microporous carbon which may interact with IMP through H-bonding and dipole–dipole attraction.…”

“…The detail of the characterization of microporous carbon has been fully described in our previous work. 32,33…”

“…The detail of the characterization of microporous carbon has been fully described in our previous work. 32,33 Electrochemical measurements were performed in the presence of buffers pH 3.0 (citrate buffer), pH 5.0 (citrate buffer), pH 7.0 (phosphate buffer, PBS), pH 9.0 (carbonate buffer) or pH 11.0 (carbonate buffer). The ionic strengths of all solutions were adjusted to 0.10 M by the addition of potassium chloride (KCl).…”

A Carbon Paste Electrode Modified by Bentonite and l‐Cysteine for Simultaneous Determination of Ascorbic and Uric Acids: Application in Biological Fluids

“… [13] Both UA and AA are often co‐present in human biological fluids, especially blood and urine. [14] …”