大孔树脂吸附纯化何首乌中二苯乙烯苷的研究

目的:研究大孔吸附树脂纯化生首乌二苯乙烯苷的工艺及参数。方法:以树脂的比吸附量为指标,比较了4种大孔树脂对二苯乙烯苷的吸附性能,对大孔树脂吸附纯化生首乌中二苯乙烯苷的工艺参数进行筛选,并在此基础上考察了洗脱条件。结果:S-8树脂对二苯乙烯苷的吸附性能最好,树脂的处理量为1.6 g生药.g^-1湿树脂,上样液含量为0.2 g生药.mL^-1,流速1.5 mL.min^-1,pH 7～8,10BV(即15 mL.g^-1树脂)50%乙醇为洗脱溶剂。通过本工艺生首乌的二苯乙烯苷比吸附量达36.89 mg.g-1。结论:工艺简单,树脂再生容易,该纯化方法可取。

Study on purification of 2,3,5,4'-tetrahydroxy-stilbene-2-O-β-D-glycoside from Polygonum multifiori

OBJECTIVE: To study the conditions and parameters of purifying 2,3,5,4'-tetrahydroxy-stilbene-2-O-beta-D-glycoside from Polygonum multiflori. METHOD:Absorption capacity of four resins for 2,3,5,4'-tetrahydroxy-stilbene-2-O-beta-D-glycoside was compared. With the adsorption ability as indexes, the process of absorbing and purifying 2,3,5,4'-tetrahydroxy-stilbene-2-O-beta-D-glycoside from P. multiflori with S-8 macroporous resin absorbent was selected by orthogonal design. RESULT: The S-8 resin was the best of the four resins. The optimum process condition was 50% ethanol as eluting solvent, the flow rate at 1.5 mL x min(-1), pH at 7-8, and the solution concentration at 0.2 g x mL(-1). The absorption capacity by this process was 36.89 mg x g(-1). CONCLUSION: The process is simple and convenient and the regeneration of resin is easy, so this method of purification is advisable.