Ricerc@Sapienza

A new electroanalytical method has been developed for the determination of polar antioxidant compounds in
extra virgin olive oils. This method is based on the extraction of polar antioxidant compounds from extra-virgin
olive oils by means of a deep eutectic solvent and their determination by a modified screen-printed electrode
platform. The platform sensitivity was increased by modifying the working electrode with MWCNT and TiO2
nanoparticles as modifiers and Nafion as a binder. The platform showed very good sensitivity in detecting polar
antioxidant compounds in extra-virgin olive oils in a fairly wide range of concentrations. The measurements
were performed by using square wave voltammetry. The extraction was performed without using organic solvents,
making the method environmentally friendly. The proposed method has been compared with a common
spectrophotometric one, the results appeared in good agreement. The method is sufficiently easy and quick to be
used for screening analyses of polar antioxidant compounds in extra-virgin olive oils on the field.