TTF-TCNQ COMPLEX BASED PRINTED BIOSENSOR FOR LONG-TERM OPERATION

A printed amperometric glucose sensor based on glucose oxidase adsorbe d on crystals of tetrathiafulvalene-tetracyanoquinodimethane (TTF-TCNQ ) is described. The sensitivity and the stability of the sensor are af fected by the binder and solvent used for the preparation of the GOD.T TF-TCNQ paste. The sensors are continuously used in a flow injection a nalysis (FLA) system under continuous polarization at 0.15 V (vs Ag/Ag Cl) at 37 degrees C. The developed sensors exhibit a large response cu rrent, an extended linear range and oxygen independence. The sensors c an be used for more than 3 months. The GOD.TTF-TCNQ paste is suitable for the preparation of planar sensor by screen printing method.