Electrochemical sensor for detection of europium based on poly-catechol and ion-imprinted sol-gel film modified screen-printed electrode

A novel europium electrochemical sensor was constructed by sol-gel. Poly-catechol film coupled with Eu(III) ion-imprinted membrane formed by electropolymerization and sol-gel method, respectively. They were introduced as signal amplifying materials as well as recognition elements for the sensor. The sensor was characterized by CV and EIS. The sensor exhibited good selectivity and can determination of Eu3+ in water samples without any pretreatment.185