title: [Determination of imperialine and imperialine-3 beta-D-glucoside in bulbs of Fritillaria pallidiflora by HPLC-ELSD].
abstract: OBJECTIVE
  To establish an HPLC (high performance liquid chromatography)-ELSD (evaporative light scattering detector) method for the quantification of chromophore-lacking imperialine (I) and imperialine-3 beta-D-glucoside (II) in bulbs of Fritillaria pallidiflora.
  
  
  METHODS
  By optimizing the chromatographic conditions of HPLC and the parameters of ELSD to test the methodology. Column: Kromasil C-18 (5 microns, 200 mm x 4.6 mm), mobile phase: acetonitrile-water-triethylamine (71:29:0.03), flow rate: 1.0 mL.min-1, drift tube temperature: 88 degrees C, gas flow-rate: 2.38 L.min-1.
  
  
  RESULTS
  The calibration curves were linear in the range of 60.72-161.92 micrograms.mL-1 for I and 48.72-194.88 micrograms.mL-1 for II. The precisions (RSD) of intra-day and inter-day were less than 1% for I and II. The recoveries of the amounts of 24.28, 30.35 and 36.42 micrograms for I were 97.1%, 96.6% and 96.8%, and 24.20, 30.24 and 36.29 micrograms for II were 95.8%, 96.9% and 96.0%. The minimal detectable concentrations of I and II were 2.43 and 1.53 micrograms.mL-1 respectively.
  
  
  CONCLUSIONS
  The established method is simple, rapid, accurate and sensitive, and can be utilized to determine the contents of imperialine and imperialine-3 beta-D-glucoside in crude drug Yibeimu (derived from the bulbs of Fritillaria pallidiflora).
authors.affiliation: Department of Pharmacognosy, China Pharmaceutical University, Nanjing 210009, China. songlinli@hotmail.com
authors.forename: S L
authors.initials: SL
authors.lastname: Li
authors.forename: P
authors.initials: P
authors.lastname: Li
authors.forename: L J
authors.initials: LJ
authors.lastname: Zheng
mesh_terms: D002595:Cevanes / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D031410:Fritillaria / Q000737:chemistry*; D005960:Glucosides / Q000032:analysis*; D010946:Plants, Medicinal / Q000737:chemistry*; D011786:Quality Control
chemical_list: D002595:Cevanes; D005960:Glucosides; C068448:imperialine-beta-glucoside; C047331:peiminine