Welcome to Chemistry and Industry of Forest Products,

Chemistry and Industry of Forest Products ›› 2015, Vol. 35 ›› Issue (5): 105-110.doi: 10.3969/j.issn.0253-2417.2015.05.017

Previous Articles     Next Articles

Separation and Purification of Carnosic Acid from Rosemary Leaves

XIA Tian-juan1, BI Liang-wu1,2, ZHAO Zhen-dong1,2, CHENG Xian1, XING Ya-li1   

  1. 1. Institute of Chemical Industry of Forest Products, CAF;National Engineering Lab.for Biomass Chemical Utilization;Key and Open Lab.of Forest Chemical Engineering, SFA;Key Lab.of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China;
    2. Research Institute of Forestry New Technology, CAF, Beijing 100091, China
  • Received:2014-07-16 Online:2015-10-25 Published:2015-10-24

Abstract: Using the composite method of the following three steps to get carnosic acid from rosemary leaves, the purity of carnosic acid was 21.06% by ultrasound-assisted ethanol extraction. The purity of carnosic acid was 79.62% by ultrasonic-assisted n-hexane extraction and pH adjustment. The optimization conditions of ultrasonic-assisted n-hexane extraction were liquid/solid ratio 20:1(mL:g), ultrasonic frequency 28 kHz, ultrasonic time 40 min, ultrasonic power 140 W. Under these conditions, the yield of carnosic acid was 2.0%. The optimization conditions of silica gel column chromatography were particle sizes of silica gel 48-75 μm, the volume ratio of eluent ethyl acetate and petroleum ether 4:7, the flow rate 6 mL/min and 0.3 g solid loaded. The recovery rate of carnosic acid was 54.12%. The purity of carnosic acid was 95.18% by this method.

Key words: carnosic acid, ultrasound-assisted extraction, purification, column chromatography

CLC Number: