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Abstract: Despite great technological advancements, the rapid, on-the-spot identification of gutter oils continues to be a great challenge. In this study, capsaicin is chosen as a biochemical marker of gutter oil, and an electrochemical sensor of this marker is developed based on multi-walled carbon nanotubes/molecularly imprinted polymers (MWCNTs-MIP). The MIP-modification of MWCNTs is achieved using 4-vinylpyridine as a functional monomer and capsaicin as a template. The electrochemical behavior of the prepared sensor is evaluated by differential pulse voltammetry, and the optimal conditions are determined. The results show a significantly linear response of the sensor towards capsaicin in the range of 0.05 × 10-6 - 1 × 10-4 mol L-1, with a limit of detection (LOD) of about 0.02 μmol L-1. The sensor also exhibits excellent selectivity, repeatability, and stability in real sample detection
Template and target information: capsaicin
Author keywords: Electrochemical sensor, Molecularly imprinted polymers, gutter oil, Capsaicin