净选加工，可根据具体情况，分别使用挑选、筛选、风选、水选、剪、切、刮、削、剔除、酶法、剥离、挤压、燀、刷、擦、火燎、烫、撞、碾串等方法，以达到净度要求。根据中华人民共和国药典2020版四部0213炮制通则。
Purification and processing can be carried out according to specific circumstances, using methods such as selection, screening, wind selection, water selection, cutting, scraping, peeling, removal, enzymatic method, stripping, squeezing, simmering, brushing, wiping, singeing, scalding, bumping, and grinding, in order to achieve the required purity. This is in accordance with the general rules for processing in Section 0213 of the 2020 edition of the Pharmacopoeia of the People's Republic of China.