Adsorption and Desorption of Licorice Flavonoid with Macroporous Resins / 中国中医药信息杂志

Objective To study the adsorption and separation of licorice flavonoid with macroporous resins. Methods Eight types of macroporous resin were selected to compare their performances in absorbing and desorbing licorice flavonoid. The optimal type for licorice flavonoid was decided, meanwhile, its kinetic curve and dynamic absorbing behavior were studied. Results HPD300 resin possessed higher adsorption and desorption capacity. The appropriate adsorption and desorption conditions were as follows:concentration of sample was 2.0 mg/mL, velocity of sample solution was 1.5 BV/h, volume of sample solution was 2 BV (bed volume);velocity of 80%ethanol was taken as eluant 1.5 BV/h, and the volume was 3 BV. Flavonoid content was increased more than 2 times under above conditions. Conclusion HPD300 macroporous resin showed better comprehensive adsorption property. It can be used to purify and separate licorice flavonoid.

Comparative Study of Volatile Oil Extraction Process from Flowers of Elaeagnus angustifolia L.with Steam Distillation and Supercritical CO_2 Extraction / 中国中医药信息杂志

Objective To optimize the extraction process by determing the volatile oil yield of steam distillation and supercritical CO2 extraction from flowers of Elaeagnus angustifolia L..Methods Orthogonal test was carried out to compare two extraction effects between steam distillation and supercritical CO2 extraction by detecting the extraction ratio from flowers of Elaeagnus angustifolia L..Results Steam distillation time on volatile oil extraction has the greatest impaction,and the best condition of supercritical CO2 extraction was extraction pressure of 20 MPa,extraction temperature of 40 ℃,and flux of CO2 is 10 L/h.Conclusion Compared with steam distillation,supercritical CO2 extraction spends less time,has higher efficiency and less harm to the materiel after extracting.It adapts to batch process and is convenient for subsequent extraction technology.

Study on Extraction Process of Polysaccharides from Elaeagnus angustifolia L. by Enzymatic- assisted Ultrasonic Methods / 中国中医药信息杂志

Objective To optimize the technological conditions of polysaccharide extraction from Elaeagnus angustifolia L. by enzymatic-assisted ultrasonic. Methods The effects of different enzymes, enzymolysis temperature, enzyme dosage, enzymolysis time, material-water ratio, crushing degree, ultrasonic time and ultrasonic temperature on the extraction rate of Elaeagnus angustifolia L. polysaccharide was analyzed. Results The optimal technological condition was as follows:1.5% cellulase, 1.5% pectic enzyme, enzymolysis time 40 min, enzymolysis temperature 55 ℃, ultrasonic time 25 min, ultrasonic power 400 W, material- water ratio 1∶30, and temperature 60 ℃. In these conditions, the extraction efficiency of polysaccharide was 12.35%. Conclusion The process is simple and practicable, and can be used for the extraction of Elaeagnus angustifolia L. polysaccharide.