Functionalized TiO2 Nanotube Platform for Gliadin Electroanalysis

Crystals

Alexandra Constantinescu¹  Cristina Dumitriu¹  Cristian Pirvu¹ 

[1] General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 313 Splaiul Independentei, 060042 Bucharest, Romania;

关键词: titanium dioxide nanotubes;    electrochemical methods;    gliadin detection;   

DOI  :  10.3390/cryst11010022

来源: DOAJ

【 摘 要 】

The present paper presents a gliadin detection method. This method is based on a modified Ti electrode. Modification was performed by a simple and cheap anodization. Then, a layer of graphene oxide was added, and gliadin antibody was fixed on the electrode surface. Using this complex system, electrochemical impedance spectroscopy was used for gliadin detection. Solutions with known gliadin (a fraction from gluten) content were used for analysis. Impedance measured at a certain frequency and coating resistance were analyzed. Better results (good linearity and lower detection limit) were obtained by plotting impedance at a certain frequency versus gliadin concentration. Coating resistance was proved to be in linear dependency with gliadin concentration only at lower concentrations. This system based on titanium nanostructured electrode has the potential to be used for gluten contamination detection from foods.

【 授权许可】

Unknown