▎ 摘　　要

NOVELTY - An adrenaline-based composite membrane modified electrode detecting method involves preparing platinum nano-fibres and an acidified multi-walled carbon nano-tubes and adding the nano-tubes to a graphene quantum dots solution, which is mixed to reflux to obtain a black solution and centrifuged to remove the supernatant. A glassy carbon electrode is polished, the multi-walled carbon nano-tubes graphene quantum dots dispersed droplets obtained by dispersing the graphene composite nano-material and coated on the surface of the glassy carbon electrode to obtain the multi-walled carbon nano-tubes graphene quantum dots. The electrode is sprayed on the surface of the glassy carbon electrode modified by graphene quantum dots by platinum nano-fibres solution to obtain platinum nano-fibres/multi-walled carbon nano-tubes graphene quantum dots/glassy carbon electrode composite membrane modified electrode. USE - Method for detecting adrenaline-based composite membrane modified electrode for food safety and animal husbandry. ADVANTAGE - The method enables detecting adrenaline-based composite membrane modified electrode with better repeatability, stability and anti-jamming capability, high detection limit and better linear relation and recovery rate. DETAILED DESCRIPTION - An adrenaline-based composite membrane modified electrode detecting method involves preparing a platinum nano-fibres and acidified multi-walled carbon nano-tubes, adding the acidified multi-walled carbon nano-tubes to a graphene quantum dots solution, where the concentration of graphene quantum dots is 0.8-1.2 mg/mL, the mass-to-volume ratio of the acidified multi-walled carbon nano-tubes to the graphene quantum dots solution is 0.01-0.015 g: 10-15 mL. The solution is mixed for 3-7 hours, the reaction is refluxed at 100 degrees C for 3-5 hours to obtain a black solution, which is cooled. The black solution is centrifuged at 10,000 rpm for 8-12 minutes, the supernatant is removed, and the obtained precipitate is multi-walled carbon nano-tubes graphene quantum dots composite nano-material. The surface of the glassy carbon electrode is polished, ultrasonically washed and dried, the multi-walled carbon nano-tubes graphene quantum dots dispersed droplets obtained by ultrasonically dispersing the multi-walled carbon nano-tubes graphene composite nano-material are coated on the surface of the glassy carbon electrode and dried to obtain the surface by multi-walled carbon nano-tubes graphene quantum dots. The modified glassy carbon electrode is sprayed on the surface of the glassy carbon electrode modified by multi-walled carbon nano-tubes graphene quantum dots by platinum nano-fibres solution to obtain platinum nano-fibres/multi-walled carbon nano-tubes graphene quantum dots/glassy carbon electrode composite membrane modified electrode. The concentration of multi-walled carbon nano-tubes graphene quantum dots in the multi-walled carbon nano-tubes graphene quantum dots dispersion is 0.5-2.0 mg/mL and the concentration of platinum nano-fibres in the platinum nano-fibres solution is 0.5-2.0 mg/mL. The platinum nano-fibres/multi-walled carbon nano-tubes graphene quantum dots/ glassy carbon electrode composite membrane modified electrode is used as the working electrode, the silver/silver chloride electrode is used as the reference electrode, and the platinum wire electrode is used as the counter electrode to obtain a three-electrode system. The differential pulse voltammetry is used to investigate the adrenaline, the electrochemical activities on different modified electrodes and different concentrations of adrenaline are tested, the working standard curve is drawn, and the adrenaline in the sample is tested by standard addition method. An INDEPENDENT CLAIM is also included for an adrenaline-based composite membrane modified electrode detected by the method.