title: [Comparison of microwave-assisted and conventional extraction of Corydalis yanhusuo].
abstract: OBJECTIVE
  To compare the extraction yield and economic cost in the microwave-assisted extraction and conventional extraction of Corydalis yanhusuo.
  
  
  METHODS
  Both of the extractions of Corydalis yanhusuo were optimized by orthogonal design. The contents of tetrahydropalmatine and total alkaloids were determined by HPLC and ultraviolet spectrophotometer, respectively. Meanwhile, the electricity consumption was determined in the extraction process.
  
  
  RESULTS
  Comparing with conventional extraction, the microwave-assisted extraction saved time and money, and provided higher extraction yield of tetrahydropalmatine and total alkaloids.
  
  
  CONCLUSIONS
  The microwave-assisted extraction has advantages in high efficiency and low cost.
authors.affiliation: Key Laboratory of Modern Preparation of TCM, JiangXi University of Traditional Chinese Medicine/Ministry of Education, Nanchang 330004, China.
authors.forename: Gen-Hua
authors.initials: GH
authors.lastname: Zhu
authors.forename: Guang-Fa
authors.initials: GF
authors.lastname: Wang
authors.forename: Xin-Li
authors.initials: XL
authors.lastname: Liang
authors.forename: Zheng-Gen
authors.initials: ZG
authors.lastname: Liao
authors.forename: Guo-Wei
authors.initials: GW
authors.lastname: Zhao
authors.forename: Qie-Ying
authors.initials: QY
authors.lastname: Jiang
authors.forename: Ming
authors.initials: M
authors.lastname: Yang
mesh_terms: D000470:Alkaloids / Q000032:analysis / Q000302:isolation & purification; D001600:Berberine Alkaloids / Q000032:analysis / Q000302:isolation & purification*; D002851:Chromatography, High Pressure Liquid; D031311:Corydalis / Q000737:chemistry*; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification; D000431:Ethanol / Q000737:chemistry; D008872:Microwaves; D010936:Plant Extracts / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D015203:Reproducibility of Results; D027343:Rhizome / Q000737:chemistry; D012997:Solvents / Q000737:chemistry; D013678:Technology, Pharmaceutical / Q000191:economics / Q000379:methods*
chemical_list: D000470:Alkaloids; D001600:Berberine Alkaloids; D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; D012997:Solvents; D000431:Ethanol; C014215:tetrahydropalmatine