Separation of phenols from Melastoma dodecandrum with macroporous resins / 中草药

ABSTRACT

Objective To explore the optimal techniques in separation of phenols from Melastoma dodecandrum with macroporous resins.Methods Static and dynamic adsorption-desorption methods were adopted,and the concentration of phenols was measured by UV spectrophotometer to evaluate the separa-ting efficiency.Results The HPD 100 macroporous resin was found with the best separating efficiency,by which the content of phenols could reach more than 50 percent in the extraction.The optimum technique condition was 0.2 g/mL concentration of crude drug,pH value was 2.7—4.5,adsorption in 3 BV/h,delution by 5 BV,60% alcohol in 3 BV/h.Conclusion This method is simple and feasible with good efficiency of separation,which could also meet the industrial requirements.