Novel organophosphorus pesticide sampling device based on thin film diffusion gradient technology

The invention develops a novel organophosphorus pesticide sampling device based on a thin film diffusion gradient (DGT) technology, establishes a corresponding liquid chromatography detection method, and comprises the following steps: preparing a stationary phase and a diffusion phase, and assembling the DGT device. The detection method comprises the following steps: passive sampling of the organophosphorus pesticide and high performance liquid chromatography determination of the organophosphorus pesticide content. The 1-butyl-3-methylimidazolium salt ionic liquid is used as the stationary phase for the first time, and the liquid stationary phase DGT capable of adsorbing organophosphorus pesticides is successfully prepared. The liquid-phase sealing of the ionic liquid is realized through the agarose gel. Compared with a traditional stationary phase substance, due to the innovation of the stationary phase substance, the raw materials used by the stationary phase substance are simple, the cost is low, meanwhile