... http://www.duoclieu.org/2012/02 /diep- ca- houttuynia-cordata-thunb-ho-la.html http://doc.edu.vn/tai-lieu/de-tai-ky-thuat -chiet- xuat-va-phan-lap -flavonoid- tu- cay -diep- ca- 8673/ http://www.kew.org/plants-fungi/Houttuynia-cordata.htm ... Ethyl acetat - MeOH- nước (10:0,5:1) + + 4 n-BuOH-ethyl acetat- nước (6:2:0,5) + 5 Ethyl acetat-aceton- nước (8:1,8:0,2) + + +s 6 Cloroform-ethyl acetat (2:8) + 7 Butyl acetat-aceton (30:1) ... hệ dung môi khác nhau ethyl acetat-nước-acid formic-acetic (100:10:5:5), Etoac-aceton-(H20) (4:5,5:0,5), CHCl3-HCOOH-CH3COOH (6:2:0,5), butyl - nước- acid formic (15:5:5)(hình 10.11.12.13),...