title: Microwave-assisted extraction of tanshinones from Salvia miltiorrhiza bunge with analysis by high-performance liquid chromatography.
abstract: A novel microwave-assisted extraction (MAE) method has been developed for the extraction and determination of tanshinones (tanshinone IIA, cryptotanshinone and tanshinone I) from the root of Salvia miltiorrhiza bunge with analysis by HPLC. Various experimental conditions were investigated to optimize the percentage extraction. Under appropriate MAE conditions, such as ethanol concentrations of 95% (v/v), MAE for 2 min, liquid/solid ratio of 10:1 (ml/g), the percentage extraction can reach high in a short time. The percentage extraction (tanshinone IIA: 0.29%; cryptotanshinone: 0.23%; tanshinone I: 0.11%) by MAE was the same or even higher than conventional extraction methods. MAE only needs 2 min, but extraction at room temperature, heat reflux extraction, ultrasonic extraction and Soxhlet extraction need 24 h, 45 min, 75 min and 90 min, respectively. MAE was also available in pilot plant form for larger scale extraction.
authors.affiliation: Young Scientist Laboratory of Separation Science and Engineering, State Key Laboratory of Biochemical Engineering, Institute of Chemical Metallurgy, Chinese Academy of Sciences, Beijing.
authors.forename: X
authors.initials: X
authors.lastname: Pan
authors.forename: G
authors.initials: G
authors.lastname: Niu
authors.forename: H
authors.initials: H
authors.lastname: Liu
mesh_terms: D045784:Abietanes; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008872:Microwaves; D010616:Phenanthrenes / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D027544:Salvia / Q000737:chemistry*; D012997:Solvents
chemical_list: D045784:Abietanes; D010616:Phenanthrenes; D012997:Solvents; C021751:tanshinone