Objective: Storage time without use (STWU) in the supporting electrolyte solution
for time periods beyond 30 hours deactivates poly(o-aminophenol) (POAP) films.
Observations: Deactivated POAP films exhibit a lower conductivity than freshly prepared
(nondeactivated) films Considering the interest in POAP synthesized in acid medium in both
basic and applied research, not much attention has been paid to the decay of the
electroactivity of POAP caused by its extensive use.
Conclusion: Deactivation of poly(o-aminophenol) (POAP) film electrodes by STWU in the
supporting electrolyte solution is reviewed in this work.