truyen chiia mot s6 benh nhu viem khi quan, ho lau ngay, viem than, viem bang quang, bi tieu tien, phu thiing, dau mit sung do, tieu chay, ly, chay mau cam...(2)(8). Thanh phan
hoat chit cua ma d l P major gom co iridoid
glycosid, cac din xuit ciia acid caffeic, flavonoid, terpenoid, polysaccharid... (1). Trong do, aucubin la thanh phin chinh cua nhom iridoid glycosid, da dugc chung minh CO tac dung sinh hgc nhu bao ve gan, chong dgc nim (8), diiu hoa mien dich (1), chong viem (5).. .Do vay, viec nghien cuu xay dung cac phuong phap xac dinh thanh phan hoat chat la c§n thilt, phue vu cho nghien cuai, tieu chuan hoa chit lugng dugc lieu cung nhu cac san pham thuoc. Cac phuong phap dinh lugng aucubin da dugc mo ta nhu HPLC va TLC- Scanning (3) (4)(6), trong do, phuang phap thir 2 co mot so uu diem nhu each tien hanh don gian, khong doi hoi diiu kien xir ly mlu phue tap, co thi tiln hanh dong thdi nhieu mlu tren cung mot lop mong, dat hieu qua ve kinh te va cho ket qua dang tin cay. TLC-' Scanning da dugc ghi trong Dugc diin Trung Qu6c (DDTQ) 2000 (7) dugc xem nhu mgt phuong phap chinh de danh gia chat lugng dugc lieu ciing nhu cac che phim. Tuy nhien, cho den nay, ky thuat nay vin con mdi me chua dugc ap dung pho bien a Viet Nam. De gop phan nghien cuu
tieu chuan hoa chit lugng loai P. major L. d
Viet Nam, chung toi da tiSn hanh xay dung phuang phap phan tich xac dinh aucubin bdi ky thuat da neu va ap dung khao sat chit lugng mgt s6 mlu dugc lieu thu hai d Ha Ngi,