Selective detection of uric acid in the presence of ascorbic acid at physiological pH by using a β-cyclodextrin modified copolymer of sulfanilic acid and N-acetylaniline

Electrochemical behavior of poly (naphthol green B)-film modified carbon paste electrode and its application for the determination of dopamine and uric acid

“…The current enhancement was 10 times higher than that at the bare electrode. It has been previously reported that UA exists in the neutral form in weak acidic buffer solution [39], accordingly in this paper poly (NGB)-film encapsulates UA and catalyzes its oxidation. The enhancement in current of UA reasonable to originate from the multielectroactive spots (quinoid structure) inside the polymers and big surface area due to the presence of poly (NGB)-film which result in the accumulation of UA molecules and improve the oxidation peak current.…”

Non-enzymatic sensing of uric acid using a carbon nanotube ionic-liquid paste electrode modified with poly(β-cyclodextrin)

“…UA shows very strong electrochemical activity, and it can be irreversibly oxidized in aqueous solution [19]. As a guest molecule, uric acid can form inclusion complexes with cyclodextrins through hydrophobic and hydrogen-bonding interaction [20]. Therefore, cyclodextrins as modifiers can improve the sensitivity and selectivity of sensor.…”

<i>β</i>-cyclodextrin Covalently Functionalized Single-Walled Carbon Nanotubes: Synthesis, Characterization and a Sensitive Biosensor Platform

“…In the case of SWCNTs-β-CD/GCE, however, two well-distinguished anodic peaks at potentials of 8 and 379 mV were observed, corresponding to the oxidation of AA and UA, respectively, (curve B). Worth noticing is that the anodic peak potential difference between AA and UA is approximately 371 mV, which is much bigger than early reported methods [41][42][43]. This suggested the electron transfer on the modified GCE was facilitated.…”