▎ 摘　　要

NOVELTY - Beta-cyclodextrin/magnetic nanoparticle/graphene oxide (GO) electrochemical sensor includes the beta -cyclodextrin/magnetic nanoparticle/GO composite material is adhered to an electrode sheet to make a modified electrode. The modified electrode is used as the working electrode, the saturated calomel electrode is used as the reference electrode, and the platinum sheet electrode is used as the auxiliary electrode to form an electrochemical sensor. USE - Beta-cyclodextrin/magnetic nanoparticle/graphene oxide electrochemical sensor for detecting the content of serotonin (claimed). ADVANTAGE - The beta-cyclodextrin/magnetic nanoparticle/graphene oxide electrochemical sensor have the characteristics of large specific surface area, fast electron transfer, strong catalytic ability, and good dispersion. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a application method of the beta -cyclodextrin/magnetic nanoparticle/GO electrochemical sensor, which involves: (A) making a standard curve and linear equation, and placing the beta -cyclodextrin/magnetic nanoparticles/GO electrochemical sensor in the serotonin solution; (B) using differential pulse voltammetry to determine the maximum peak current density of the electrochemical sensor in different concentrations of serotonin solutions, and listing the linear equations were listed; (C) analyzing and determine the content of serotonin in the actual sample according to the linear relationship of the serotonin standard; (D) measuring the sample to be tested by placing the beta -cyclodextrin/magnetic nanoparticle/GO electrochemical sensor in the water sample solution and the serum sample solution; and (E) using differential pulse voltammetry to determine the peak current density of serotonin in water and serum samples, and then using the linear equation obtained to calculate the concentration of serotonin in the sample to be tested.