Synthesis of poly(methacrylic acid)/functionalized carbon nanotubes nanocomposite modified electrode for electrochemical sensitive determination of acrylamide in food sample

Abstract

Poly(methacrylic acid) and functionalized carbon nanotubes nanocomposite modified glassy carbon electrodes (PMAA, f-CNTs, and GCE) have been synthesized for electrochemically sensitive determination of acrylamide (AA) in food samples. A study of the structure and morphology of modified electrodes using XRD and FE-SEM analyses showed that the f-CNTs were completely covered by PMAA molecules in the nanocomposite. Electrochemical studies on the determination of AA by PMAA/f-CNTs/GCE sensors using CV and DPV techniques showed that PMAA/f-CNTs nanocomposite enhanced the sensitivity and selectivity of an electrochemical sensor due to the synergetic effect of f-CNTs and PMAA. Results indicated a sensitivity of 0.0171 µA/μM, detection limit of 15 μM and a linear range of 0–2400 μM. Results of the study on the applicability and verification of the PMAA/f-CNTs/GCE as an AA sensor in prepared real samples of potato crisps indicated a notable conformity between the results of DPV and ELISA assays, and the relatively small values of RSD (3.41–5.11 %) and recovery (97.50–99.00 %) values for DPV analysis were acceptable which corroborated the appropriate applicability and validation of the results of PMAA/f-CNTs/GCE for determination of AA content in food samples.