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Abstract: The potential application of electrochemical sensors in bioassays has triggered lots of research on the development of highly sensitive and selective sensing platforms. Here, a novel electrochemical sensor was designed and successfully constructed by the molecularly imprinting technology for the efficient detection of tryptamine. The sensor was modified with the composite film of multiwalled carbon nanotubes-ionic liquid and tryptamine imprinted chitosan-porous Pt. The morphology and structure of the nanocomposite were characterized by scanning electron microscope, energy dispersive spectrometer, and X-ray diffraction. Results confirmed the successful construction of the target electrochemical sensor. The performance of the as-prepared sensor was characterized by the electrochemical methods. Under the optimal conditions, the ideal linear range of the electrochemical sensor toward tryptamine was from 5.0 × 10-8 to 6.0 x10-5 M with the excellent limit of detection of 4.58 × 10-8 M at S/N = 3. The as-prepared electrochemical sensor showed good stability, reproducibility and selectivity for tryptamine, which is very important for its practical usage. Ultimately, the sensor was successfully applied to detect tryptamine in food samples of both lactobacillus beverage and cheese
Template and target information: tryptamine
Author keywords: Porous Pt, Multiwalled carbon nanotubes-ionic liquid, Molecularly imprinted polymers, Electrochemical sensor, tryptamine