Electrochemical determination of acetaminophen based on TiO2-graphene/poly(methyl red) composite film modified electrode

► TiO2-graphene/poly(methyl red) modified electrode was developed for acetaminophen detection. ► Linear range was 0.25-50 μM with detection limit of 2.5 × 10− 8. ► Pharmaceutical samples were determined with recoveries of 95.3-104.2%.