FORMATION OF MATRIX POLYMERS SENSITIVE TO ANILINE AND PHENOL

Electrochemical sensors sensitive to aniline were prepared by matrix p olymerization and studied. Polyaniline electrodes under investigation were synthesized by electrochemical polymerization of 0.1 M aniline in 1.0 M aqueous HCl and 1.0 M NaCl, as well as in 1.0 M NaClO4 in CH3CN either in potentiostatic mode at 0.6, 0.9, and 1.2 V relative to Ag-A gCl or by potential cycling between -0.2 and 0.8 V; -0.2 and 1.1 V rel ative to Ag-AgCl. It was found that electropolymerization under condit ions of maximal polymer film density results in a significant increase in selectivity. The regularities in sensor functioning were studied u nder various test conditions.