Journal
ULTRASONICS SONOCHEMISTRY
Volume 20, Issue 1, Pages 180-186Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2012.07.002
Keywords
Aqueous ionic liquid; Ultrasonic assisted extraction; Four acetophenones; Cynanchum bungei Decne
Categories
Funding
- College of Shandong province of science and technology plan [J11LC24]
Ask authors/readers for more resources
In this study, an aqueous ionic liquid based ultrasonic assisted extraction (ILUAE) method for the extraction of the four acetophenones, namely 4-hydroxyacetophenone (1), 2,5-dihydroxyacetophenone (2), baishouwubenzophenone (3) and 2,4-dihydroxyacetophenone (4) from the Chinese medicinal plant Cynanchum bungei was developed. Three kinds of aqueous 1-alkyl-3-methylimidazolium ionic liquids with different anion and alkyl chain were investigated. The results indicated that ionic liquids (ILs) showed remarkable effects on the extraction efficiency of acetophenones. In addition, the ILUAE, including several ultrasonic parameters, such as the ILs concentration, solvent to solid ratio, power, particle size, temperature, and extraction time have been optimized. Under these optimal conditions (e.g., with 0.6 M [C4MIM]BF4, solvent to solid ratio of 35:1, power of 175 W, particle size of 60-80 mesh, temperature of 25 degrees C and time of 50 min), this approach gained the highest extraction yields of four acetophenones 286.15, 21.65, 632.58 and 205.38 mu g/g, respectively. The proposed approach has been evaluated by comparison with the conventional heat-reflux extraction (HRE) and regular UAE. The results indicated that ILUAE is an alternative method for extracting acetophenones from C. bungei. (c) 2012 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available