*2.6. Adsorption Reusability*

After 20 mg Bi-MIP was adsorbed and balanced in 20 mL chrysin solution, the saturated adsorption sample was obtained by centrifugation. The Bi-MIPs were cleaned with a methanol solution for several times, and then dried and weighed. The processed Bi-MIPs were subjected to the adsorption test again. Under the same conditions, the adsorption–desorption cycle was performed 5 times, and the adsorption amount determined the concentration after adsorption each time and calculated the adsorption amount according to Formula (1).
