Kinetic studies for ultrasound-assisted supercritical carbon dioxide extraction of triterpenic acids from healthy tea ingredient Hedyotis diffusa and Hedyotis corymbosa

doi:10.1016/j.seppur.2015.01.008

CNU IR > College of Sustainable Environment and Recreation > Dept. of Environmental Engineering and Science (including master's program) > Periodical Articles > Item 310902800/29737

jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://ir.cnu.edu.tw/handle/310902800/29737

题名:	Kinetic studies for ultrasound-assisted supercritical carbon dioxide extraction of triterpenic acids from healthy tea ingredient Hedyotis diffusa and Hedyotis corymbosa
作者:	Wei, Ming-Chi Yang, Yu-Chiao
贡献者:	環境工程與科學系
关键词:	Hedyotis diffusa Oleanolic acid Ursolic acid Ultrasound-assisted supercritical carbon dioxide extraction Second-order kinetic model
日期:	2015-03
上传时间:	2016-04-19 19:06:23 (UTC+8)
出版者:	Elsevier Science Bv
摘要:	Hedyotis diffusa and Hedyotis corymbosa are the major ingredient of healthy teas commonly consumed in China for health maintenance. The objective of the present study was to evaluate the kinetics of a green process of ultrasound-assisted supercritical carbon dioxide (USC-CO2) extraction for determining the content of oleanolic acid (OA) and ursolic acid (UA) in both herbs. The results elucidated various advantages of USC-CO2 extraction, which can significantly increase extraction yields and reduce the extraction time and solvent consumption at lower operational conditions than the conventional SC-CO2 and solvent extraction methods. The combined USC-CO2-HPLC method was further applied to extract and quantitate the OA and UA contents in samples obtained from different geographical regions. The experimental results obtained indicate that H. diffusa and H. corymbosa were a suitable source for OA and UA production and the OA and UA content in the samples from different sources were significantly different. Furthermore, the kinetics of USC-CO2 extraction was determined based on a second-order kinetic model. The activation energies of OA and UA were 6.784 and 4.981 kJ/mol, respectively.
關聯:	Separation And Purification Technology, v.142, pp.316-325
显示于类别:	[Dept. of Environmental Engineering and Science (including master's program)] Periodical Articles

文件中的档案:

档案	描述	大小	格式	浏览次数
index.html		0Kb	HTML	1901	检视/开启

在CNU IR中所有的数据项都受到原著作权保护.

TAIR相关文章

数据加载中.....