Pesticide and veterinary drug residues in agricultural products are one of the main problems in the field of food safety. It is necessary to test the residual content of these drugs and set strict limits. At present. adsorption extraction materials such as zeolite and multi-walled carbon nanotubes have the problems of low adsorption capacity and easy clogging of pores. https://www.spidertattooz.com/OPI-Infinite-Shine-All-Your-Dreams-in-Vending-Machines-ISLT84-p27376/