作　　者： ; ; ; ;

机构地区： 肇庆学院化学化工学院

出　　处： 《化学研究与应用》 2010年第1期124-128,共5页

摘　　要： A new kind of microwave-assisted circumrotation reflux extraction device was constructed and used to study the extraction technology of gallic acid from phyllanthus urmaria L.The extraction principle of the device was same as that of microwave-assisted solvent extraction but using circumrotation techniques as auxiliary stirrer to accelerate the process.Capillary electrophoresis was used to determinate gallic acid in phyllanthus urmaria L extracts in order to evaluate the extraction efficiency of the method.It was found that the most important factors influencing extraction gallic acid were solvent kind and microwave power.The optimum extraction conditions were as follows:water using as solvent,solid-liquid ratio 1∶30(g:mL),microwave power low rail and irradiate time 4 minute.Under the optimum extraction conditions,five experiments were carried out and the average extraction rate of gallic acid in phyllanthus urmaria L was 4.32 mg/g,relative standard deviations(R.S.D.) was 2.2%.Compared with other extraction methods e.g.reflux extraction and microwave-assisted extraction,better extraction efficiency was observed for the microwave-assisted circumrotation reflux extraction. A new kind of microwave-assisted circumrotation reflux extraction device was constructed and used to study the extraction technology of gallic acid from phyllanthus urmaria L. The extraction principle of the device was same as that of microwave-assisted solvent extraction but using circumrotation techniques as auxiliary stirrer to accelerate the process. Capillary electrophoresis was used to determinate gallic acid in phyllanthus urmaria L extracts in order to evaluate the extraction efficiency of the method. It was found that the most important factors influencing extraction gallic acid were solvent kind and microwave power. The optimum extraction conditions were as follows ： water using as solvent, solid-liquid ratio 1：30 （ g： mL）, microwave power low rail and irradiate time 4 minute. Under the optimum extraction conditions, five experiments were carried out and the average extraction rate of gallic acid in phyllanthus urmaria L was 4.32 mg/g,relative standard deviations （ R. S. D. ） was 2.2%. Compared with other extraction methods e. g. reflux extraction and microwave-assisted extraction, better extraction efficiency was observed for the microwave-assisted circumrotation reflux extraction.

关 键 词： 微波辅助旋转回流提取 叶下珠 没食子酸 毛细管电泳

领　　域： [理学] [理学]