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Abstract: A sensitive molecularly imprinted electrochemical sensor was successfully constructed for the detection of acrylamide (AM). It is based on a glassy carbon electrode modified with a composites prepared from gold nanoparticles, multiwalled carbon nanotubes, and chitosan along with a sol-gel-based molecularly imprinted polymer (MIP) film. The latter was prepared using AM as the template molecule, 3-aminopropyltrimethoxysilane as the functional monomer, and tetraethoxysilane as the cross-linker. The MIP sensor showed a linear current response to the target AM concentration in the range from 0.05 to 5 μg mL-1 at a working voltage of 0-0.4 V with a lower detection limit of 0.028 μg mL-1 (S/N = 3). It was successfully applied to the detection of AM in potato chips. HPLC analysis was also conducted to detect AM in the same samples to demonstrate the applicability of the electrochemical MIP sensor
Template and target information: acrylamide, AM
Author keywords: Electrochemical sensor, acrylamide, gold nanoparticles, chitosan, Multiwalled carbon nanotubes, Sol-gel molecularly imprinted