Fecha de publicación: -- Fuente: WIPO "tomato" A screen-printed sensor for detecting aluminum ions in food and biological samples is provided. The sensor includes an aluminum ion-selective membrane containing quercetin as an aluminum ionophore and multi-walled carbon nanotubes. The sensor provides a low-cost point of analysis method to determine aluminum ion concentration in a range of from 0.008 to 1070 μM in food and beverage materials, reflecting the general detection capability of the sensor under aqueous conditions.