Copure® QuEChERS Extraction Kits include extraction pouches and 50 mL centrifuge tubes, ceramic homogenizers are optional as well.The pouches contain anhydrous extraction salts. Among the mixture, MgSO₄ is responsible for removing water from samples, while other components are responsible for maintaining appropriate pH to ensure the recovery of alkaline-sensitive pesticides.Directly adding water-abundant samples into tubes containing extraction salts may cause local overheating which compromises the resulting recoveries. To avoid such situations,Biocomma provides separate extraction salt pouches that the operator can add extraction salts after the addition of organic solvents.