INTERACTION OF CORTICOSTERONE ANTIBODY AND GLUTARALDEHYDE ADSORBED ONPT ELECTRODES MODIFIED WITH SILANE

The interaction of a corticosterone antibody and glutaraldehyde adsorb ed on a Pt electrode modified with silane was examined by cyclic volta mmetry. A mirror-polished Pt wire was oxidized for 10 min at +1.3 V vs . Ag/AgCl in 1.0 M H2SO4. The oxidized Pt wire was coated with 3-amino propyltrimethoxysilane under N-2 gas for 1 h at room temperature in be nzene, and then modified with glutaraldehyde. The modified electrodes were tested for their electrocatalytic properties and interaction with the corticosterone antibody. The cathodic peak currents (-0.4 V) exhi bited a reproducible linearity of the current intensify vs. the concen tration of anticorticosterone.