Optimization of microwave-assisted eztraction of ursolic acid in residues of Eriobotrta japonica
The optimum process of extracting ursolic acid from Eriobotrya japonica residues by microwave-assisted extraction (MAE) was studied. The optimum extraction process was optimized with orthogonal test. Experiments were made by using L9(34) orthogonal design with extractive yield of ursolic acid as index., investigating the influence of grinding degree, MAE power, MAE time, and the ratio of solid to liquid. Optimum extraction conditions were determined as follows: 95％ ethanol, MAE 350W, extraction time 190s, ratio of solid to liquid 1:10 (g:mL), extracting for three times. The yield of ursolic acid acid was 0.89％. The MAE method has higher yield, shorter extraction time and higher purity compared to Soxhlet extraction method.
microwave-assisted ursolic acid eztraction
Haili Dong Hanjun Ma
Department of Chemistry Engineering Huainan Union University Huainan,China Food College Henan Institute of Science and Technology Xinxiang,China
国际会议
上海
英文
4519-4521
2008-05-16（万方平台首次上网日期，不代表论文的发表时间）