▎ 摘　　要

NOVELTY - Method for preparing electrochemical sensor for measuring tetracycline, involves (a) adding multi-wall carbon nanotubes to a mixture of sulfuric acid and phosphoric acid, adding potassium manganate, adding hydrogen peroxide, and drying the solution to obtain a graphene oxide nanobelts, (b) dispersing the graphene oxide nanoribbons in water to obtain a graphene oxide nanoribbon solution, dissolving the thiolated cyclodextrin in water to obtain a thiolated cyclodextrin solution, mixing the nanoribbon solution and thiolated cyclodextrin solution, adding hydrogen tetrachloroaurate solution, dripping hydrazine hydrate, and drying to obtain gold nanoparticles/thiolated-beta-cyclodextrin-graphene oxide nanoribbons, and (c) pretreating the electrodes, dissolving nanoribbons in water, and dispersing to obtain nanoribbon solution, drop-coating the nanoribbon solution on the electrode surface, and drying to obtain gold nanoparticles/thiolated-beta-cyclodextrin-graphene oxide nanoribbon/GCE. USE - The method is useful for preparing electrochemical sensor for measuring and detecting tetracycline (all claimed). ADVANTAGE - The method effectively accelerates the electron transfer between the electrode and solution, improves the detection sensitivity, and has excellent repeatability and selectivity. DETAILED DESCRIPTION - Method for preparing electrochemical sensor for measuring tetracycline, involves (a) adding multi-wall carbon nanotubes to a mixture of sulfuric acid and phosphoric acid, stirring for 1 hour, adding potassium manganate, stirring at 65degrees Celsius for 2 hours, ice-bath cooling, adding hydrogen peroxide, filtering, washing, and drying the solution to obtain a graphene oxide nanobelts, (b) dispersing the graphene oxide nanoribbons in water to obtain a graphene oxide nanoribbon solution, dissolving the thiolated cyclodextrin in water to obtain a thiolated cyclodextrin solution, uniformly mixing the graphene oxide nanoribbon solution and thiolated cyclodextrin solution, adding hydrogen tetrachloroaurate solution to mix, dripping hydrazine hydrate for reduction reaction to obtain a black solution, filtering, and drying to obtain gold nanoparticles/thiolated-beta-cyclodextrin-graphene oxide nanoribbons, and (c) pretreating the electrodes, dissolving nanoribbons in water, and ultrasonically dispersing to obtain gold nanoparticles/thiolated-beta-cyclodextrin-graphene oxide nanoribbon solution, drop-coating the nanoribbon solution on the pretreated electrode surface, and drying to obtain gold nanoparticles/thiolated-beta-cyclodextrin-graphene oxide nanoribbon/GCE