Simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid by methylene blue adsorbed on a phosphorylated zirconia–silica composite electrode

Silica-alumina-niobia (SiO2/Al2O3/Nb2O5) matrix obtained by the sol-gel processing method: new material for online extraction of zinc ions

“…[8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] One of the greatest interests is its use as a porous substrate to immobilize electroactive species and the possibility to prepare a series of electrochemical sensors (chemically modified electrodes). [8][9][10][11][23][24][25][26] The metal oxides dispersed in the silica matrix are usually refractory, including TiO 2 , Al 2 O 3 , Sb 2 O 5 and Nb 2 O 5 . They present acid and basic properties and therefore can be used for adsorbing metal ions and anionic species depending upon the pH range.…”

Poly(pyridine‐3‐boronic acid)/Multiwalled Carbon Nanotubes Modified Glassy Carbon Electrodes for Simultaneous Determination of Ascorbic Acid, 3,4‐Dihydroxyphenylacetic Acid and Uric Acid

“…Up to now, there are few reports about simultaneous determination of AA, DOPAC and UA by electroanalytical method. Fortunately, various modified electrodes have been used to selectively measure one or two of these three compounds, which could motivate us to come up with good ideas for simultaneous determination of the three species [7][8][9][10][11].…”

On the applicability of SiO2/Al2O3/Nb2O5and SiO2/Al2O3/TiO2as a biocompatible platform for chloroperoxidase

“…[11][12][13][14] The metal oxides (such as SnO 2 , TiO 2 , Sb 2 O 5 and Nb 2 O 5 ) are dispersed in the silica matrix, and they present acidic and basic properties, which enables them to be used for adsorbing enzymes.…”

“…The SiO 2 /M x O y materials have found use in many applications, [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] such as their use as a porous substrate to immobilize electroactive species to prepare chemically modied electrodes. [11][12][13][14] The metal oxides (such as SnO 2 , TiO 2 , Sb 2 O 5 and Nb 2 O 5 ) are dispersed in the silica matrix, and they present acidic and basic properties, which enables them to be used for adsorbing enzymes.…”