Overoxidized polyimidazole/graphene oxide copolymer modified electrode for the simultaneous determination of ascorbic acid, dopamine, uric acid, guanine and adenine

Functional Properties of Lupinus angustifolius Seed Protein Isolates

“…Solubility. The solubility of the protein isolates was evaluated according to the methodology proposed by Ogunwolu et al [18] and Liu et al [19] with slight modifications. Each isolate was prepared in a 0.1% w/v suspension in 10 mL of distilled water.…”

X-Ray Photoelectron Spectroscopic Characterization of Chemically Modified Electrodes Used as Chemical Sensors and Biosensors: A Review

“…Wei, Chen et al developed a sensor based on a GCE surface modified by a film of overoxidized polyimidazole (PImox)/graphene oxide copolymer [50]. The copolymer was characterized by SEM, AFM, FTIR, XPS and EIS.…”

One-pot synthesis of reduced graphene oxide/zinc sulfide nanocomposite at room temperature for simultaneous determination of ascorbic acid, dopamine and uric acid

“…The graphene/nickel hydroxide nanocomposite [40], graphitic carbon nitride nanosheets doped graphene oxide [15], rGO/Au nanoplates composite [30], hemin functionalized GO [12], CTAB functionalized GO/multiwalled carbon nanotube composite [18], overoxidized polyimidazole/graphene oxide copolymer [25] have been employed in the simultaneous determination of AA, UA and DA. Although much effort has been devoted in resolving the overlapping oxidation peaks of these species, developing a facile and sensitive analytical method is still a challenge.…”

“…However, the oxidation potentials of these electroactive species are too close to be determined separately at bare glassy carbon electrode (GCE). Carbon based nanomaterials [8][9][10][11][12][13][14][15][16][17][18][19][20], polymers [21][22][23][24][25], noble metals [26][27][28][29][30][31][32][33], metal oxides [34][35][36][37][38][39], metal hydroxides [40,41] and metal complexes [42,43] have been used as effective electrode modifiers for the simultaneous determination of AA, DA and UA. Metal sulfide nanomaterials have been employed in the electrochemical sensing of AA [44,45], tryptophan [46] and dopamine [47].…”