Signal amplification by electropolymerization of alizarin red S for improved diuron detection at organosmectite modified glassy carbon electrode

An electrochemical sensor was prepared by modification of glassy carbon electrode (GCE) with an organoclay obtained by intercalation of smectite‐type clay Sa(Na) with dimethydioctadecylammonium ions (DODAB) and polymer of alizarin red S (poly[ARS]). The synthesized materials were analyzed by physicochemical and electrochemical techniques. The fabricated sensor GCE/Sa(DODAB)/poly(ARS) was employed toward the detection of diuron and the detection limit was found to be 0.48 μM (0.11 mg/L). Additionally, the elaborated electrochemical sensor was found to exhibit good sensitivity, stability, and reproducibility toward the determination of diuron, and it was applied successfully in real samples. Synthesis of an organoclay by intercalation of smectite‐type clay Sa(Na) with dimethyldioctadecylammonium ions (DODA+): Application as material on glassy carbon electrode for the electropolymerization of alizarin red S (poly(ARS)) to the detection of diuron pesticide.