Method for extracting and detecting harmful substance residues in aquatic products by using deep eutectic solvent

The invention discloses a method for extracting and detecting harmful substance residues in aquatic products by using a deep eutectic solvent, which belongs to the technical field of aquatic product detection, and can solve the problem that the recovery efficiency is reduced due to the fact that an extracting agent for existing liquid-liquid micro-extraction has toxicity and is difficult to collect. The method comprises steps ofcrushing the aquatic product sample, weighing the sample, adding a dispersant, taking out the supernatant after vortex, adding a deep eutectic solvent through a filter membrane, uniformly mixing, quickly injecting into a salt solution to complete dispersion, centrifugation and ice bath, converting an extracting agent into a solid phase, transferring into a sample injection bottle, and performing sample injection detection by using a high performance liquid chromatograph and quantitative analysis by using an external standard method. The method has the advantages of being simple, effici