节点文献

Study on Optimization of Ultrasonic-assisted Extraction of Antioxidants from Portulaca oleracea L.

免费订阅

【Author】 LU Juan* ,LIU Chun-ming,YANG Fan,CHENG Bao-hai,LI Xin-ling College of Chemistry,Changchun Normal University,Changchun,Jilin 130032,China

【摘要】 [Objective]To study the optimum extraction technology of antioxidants from Portulaca oleracea L. [Method]On the basis of single-factor experiment,the effects of ethanol concentration,solid-liquid ratio,extraction time and extraction times on scavenging rate of DPPH radical were inspected. According to the experimental design principles of Box-Benhnken,a four-factor and three-level response surface modeling ( RSM) was adopted to study the ultrasonic extraction technology of antioxidant from Portulaca oleracea L. [Result]Based on analyzing the significance of each factor and their interactions,the optimum extraction conditions were determined as follows: the ethanol concentration was 68%,solid-liquid ratio was 1∶ 22 g /ml,extraction time was 44 min and extraction times was 3. Under the optimized conditions,the actual scavenging rate of DPPH free radical was 0. 911 7,close to the theoretical value of 0. 913 501. [Conclusion]The ultrasonic method had the advantages of high extraction rate, short time and low ultrasonic power,therefore it could be the method for extracting antioxidant compounds from Portulaca oleracea L.

【基金】 Supported by Project of Jilin Education Department (2010379);Project of Changchun Normal University
  • 【分类号】R284.1
  • 【下载频次】56
节点文献中: 

本文链接的文献网络图示:

浏览历史:
下载历史: