NEW ISFET DEVICES FOR ENVIRONMENTAL-ANALYSIS

We recently developed several suitable ISFET (ion selective field effe ct transistor) devices for detecting different compounds of environmen tal interest (ie, nitrate, anionic and cationic surfactants). Measurem ents were performed in feedback mode by recording the gate output volt age variation of the ISFET related to the analyte concentration in sol ution. After a full electrochemical characterization, the new ISFETs w ere applied to the analysis of authentic aqueous matrices of environme ntal interest (river, lake, sea water, etc).