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.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2010年第1期124-128,共5页
Chemical Research and Application
基金
广西自然科学资金资助项目(0640038)
肇庆市科技计划资助项目(10560)
肇庆学院自然科学基金资助项目(0737)
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
microwave-assisted circumrotation reflux extraction
phyllanthus urmar/a L
gallic acid
capillary electrophoresis
