title: [Simultaneous determination of contents of five major bioactive components contained in Polygoni Cuspidati Rhizoma et Radix by microwave extraction-ultra performance liquid chromatography].
abstract: OBJECTIVE
  To establish a microwave extraction and UPLC method for simultaneous determination of polydatin, resveratrol, anthraglycoside B, emodin and physicion contained in Polygoni Cuspidati Rhizoma et Radix, in order to provide scientific basis for improving quality standards of Polygoni Cuspidati Rhizoma et Radix.
  
  
  METHODS
  The test solutions were prepared in a MDS-8 closed microwave system at 160 degrees C with methanol as the solvent. The UPLC analysis was performed in a Waters Acquity UPLC system. A BEH C18 column (2. 1 mm x 100 mm, 1.7 microm) was adopted for gradient elution with acetonitrile and water as the mobile phase. The temperature of column was 30 degrees C, and the detection wavelength was 226 nm.
  
  
  RESULTS
  The five active components can be completely extracted in 10 minutes and separated completely in 12 minutes according to UPLC analysis, with a good linearity (r > or = 0. 999 6) within the linear ranges. The average recovery rate was 97.00%-103.7% with RSD < or = 2. 2%. Despite a large difference in content among tested components from Polygoni Cuspidati Rhizoma et Radix, the total content of the five major constituents was relatiely stable (3.683 3%-7.1031%).
  
  
  CONCLUSIONS
  The microwave extraction-ultra performance liquid chromatography method in simultaneous determination for contents of five major bioactive components contained in polygoni cuspidati rhizoma et radix is so rapid and highly reproducible that it can be used for quality control and assessment of Polygoni Cuspidati Rhizoma et Radix.
authors.affiliation: Department of Pharmacognosy, School of Pharmacy, Fudan University, Shanghai 201203, China. luyan@fudan.edu.cn
authors.forename: Yan
authors.initials: Y
authors.lastname: Lu
authors.forename: Huali
authors.initials: H
authors.lastname: Li
authors.forename: Mudan
authors.initials: M
authors.lastname: Lin
authors.forename: Daofeng
authors.initials: D
authors.lastname: Chen
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D045468:Fallopia japonica / Q000737:chemistry*; D008516:Medicine, Chinese Traditional; D008872:Microwaves; D018517:Plant Roots / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D011786:Quality Control
chemical_list: D004365:Drugs, Chinese Herbal