▎ 摘　　要

NOVELTY - Use of fluorinated graphene in preparing extractive coatings, is claimed. USE - The fluorinated graphene/solid-phase microextraction probe is useful in preparing extractive coatings, preparing solid phase micro-extraction coating and stir bar sorption extraction coating, and in the analysis and detection of environmental trace organic pollutants (all claimed). ADVANTAGE - The method: provides a preparation method and application of a solid-phase micro-extraction probe based on a fluorinated graphene extraction coating and an adsorption extraction stirring rod; and introduces fluorine atoms into graphene to prepare fluorinated graphene. The material: has low specific surface energy, good hydrophobicity; good extraction performance for organic pollutants, simple preparation process and controllable thickness, and wide application range; adopts as a coating material for solid phase microextraction and stir bar adsorption extraction; and can resistant to organic solvent rinsing. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing fluorinated graphene comprising providing the graphene into a Teflon (RTM: Polytetrafluoroethylene) reaction cell filled with F2/Ar gas mixture, recating at constant temperature, heating, completing the reaction, cooling to room temperature, sequentially washing with sodium hydroxide and water, and drying to obtain fluorinated graphene powder; #preparing a solid-phase micro-extraction probe based on a fluorinated graphene extraction coating comprising (1) taking the stainless steel wire and sand the front end with sandpaper, initially cleaning, ultrasonically cleaning with ultrapure water, methanol and ethanol in sequence, and drying, (2) dissolving neutral silicone glue in n-hexane, magnetically stirring to assist uniform dispersion, (3) taking pretreated stainless steel wire, immersing the front end into neutral silicone glue diluent, taking out, wiping out the surface with the droplet of neutral silicone gel diluent, (4) adding the stainless steel wire coated with neutral silicone glue diluent in the fluorinated graphene powder, rolling gently, adhering, tapping the stainless steel wire part of the non-adhered fluorinated graphene powder to make the non-adherent fluorinated graphene powder fall off, repeating the step until a layer of fluorinated graphene powder is evenly and firmly adhered to the surface of the stainless steel wire, and placing in an oven to dry, (5) repeating steps (3) and (4), drying the last step (4) to obtain stainless steel wire, repeating step (3) and carrying out oven drying first and air drying, In this way, firmly adhering uniform fluorinated graphene coating to the surface of the stainless steel wire to obtain a solid-phase microextraction probe based on fluorinated graphene extraction coating; #solid-phase microextraction probe containing the fluorinated graphene extraction coating, where the length of the extraction coating on the surface of the solid-phase micro-extraction probe is 1-2 cm, and the thickness is 20-100 mu m; #preparing an adsorption extraction stirring rod based on a fluorinated graphene extraction coating comprising (I) providing large and small straight cylindrical magnetic stirrers, initial cleaning, ultrasonically cleaning with ultrapure water, methanol and ethanol in sequence, and drying, (II) dissolving the neutral silicone glue in n-hexane, and magnetically stirring to assist uniform dispersion, (III) taking the side of the small magnetic stirrer pretreated and immersing in the neutral silicone gel diluent, taking out and wiping off the neutral silicone gel dilution liquid with droplets on the surface, (IV) placing the side of the stirrer coated with neutral silicone glue diluent in the fluorinated graphene powder, pressing gently, adhering, tapping on the other side of the magnetic stirrer will cause the loosely adhered fluorinated graphene powder to fall off, repeating the step until the surface of the stirrer is evenly and firmly adhering to a layer of fluorinated graphene powder, and then placing in an oven to drying, (V) repeating the step (3) for stir bar, drying in an oven first, drying naturally to obtain a small stirrer with a layer of uniformly fluorinated graphene coating firmly adhered to the surface of the stirrer, and (6) fixing the small stirrer and large magnetic stirrer together to obtain an adsorption extraction stir bar based on a fluorinated graphene extraction coating; #adsorption extraction stirring bar based on a fluorinated graphene extraction coating, where the extraction coating area of the adsorption extraction stirring rod is 1-2 cm2, the thickness is 20-50 mu m, and a large magnetic stirrer is adsorbed at the bottom.