Hydrogen peroxide detection under physiological conditions by Prussian blue stabilized using a polyelectrolyte-surfactant complex matrix

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Poly(allylamine)-dodecylsulfate complex (PA-DS) is able to form a stable and layered structure onto graphite electrodes and can efficiently retain negatively charged ions like ferrocyanide. In this context, Prussian blue (PB) is electrochemically synthesized from a solution containing K 3[Fe(CN)6] a...

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Detalles Bibliográficos
Autores principales: Gaviglio, C., Battaglini, F.
Formato: JOUR
Materias:
Artificial peroxidase
H2O2 detection
Physiological conditions
Poly(allylamine)
Prussian blue
Sodium dodecylsulfate
Bioanalytical applications
Electrochemical behaviors
Hydrogen peroxide detections
Physiological condition
Polyallylamine
Polyelectrolyte-surfactant complexes
Graphite electrodes
Hydrogen peroxide
Peroxides
Physiology
Sodium dodecyl sulfate
Physiological models
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09254005_v182_n_p53_Gaviglio
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Poly(allylamine)-dodecylsulfate complex (PA-DS) is able to form a stable and layered structure onto graphite electrodes and can efficiently retain negatively charged ions like ferrocyanide. In this context, Prussian blue (PB) is electrochemically synthesized from a solution containing K 3[Fe(CN)6] and FeCl3 at pH 1.7. The electrochemical behavior of the new system is investigated in different supporting electrolytes (K+ and Na+) and in acid and neutral media. Remarkable, well-defined and reversible voltammetric responses are obtained, especially under physiological conditions (neutral pH and 150 mM NaCl). In these conditions, the modified electrode is able to electrocatalyze the reduction of hydrogen peroxide (H2O2) at micromolar levels, with a low detection limit and good sensitivity. These results represent an important improvement regarding further uses of PB in bioanalytical applications. © 2013 Elsevier B.V.

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