title: [Determination of 1-deoxynojirimycin in leaves of Morus alba by high performance liquid chromatography with fluorescence detection].
abstract: OBJECTIVE
  To develop a high performance liquid chromatographic method for the determination of DNJ in Morus alba leaves with fluorimetric detection after precolumn derivatization with 9-fluorenylmnethyl chlorformate (FMOC-Cl).
  
  
  METHODS
  DNJ in Morus alba leaves was extracted with 0.05 mol x L(-1) HCl, reacted with FMOC-Cl, and separated on a HiQSiL C18 column at 250 degrees C. Mobile phase consisted of acetonitrile-0.1% aqueous acetic acid (55:45) with a flow rate of 1.0 mL x min. The fluorescence detector was operated at lambdaEX = 254 nm, lambdaEM = 322 nm.
  
  
  RESULTS
  A satisfactory separation between DNJ and impurity was obtained. The calibration curve was linear over the concentration range from 0.567 microg x mL(-1) to 34 microg mL(-1), r = 0.9998. The average recovery was 97.2%. The contents of DNJ in M. alba collected in different seasons and grown in different environment were determined.
  
  
  CONCLUSIONS
  The quantity of DNJ in leaves of M. alba is related to the environment factor, temperature and growing period. The method can be used for qualioy control of the medicinal material.
authors.affiliation: School of Biological and Environmental Engineering, Jiangsu University, Zhenyiang 212013, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Ouyang
authors.forename: Yong-hui
authors.initials: YH
authors.lastname: Li
authors.forename: Wei-dong
authors.initials: WD
authors.lastname: Xu
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
mesh_terms: D017485:1-Deoxynojirimycin / Q000032:analysis*; D017753:Ecosystem; D031625:Morus / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011786:Quality Control; D012621:Seasons; D013696:Temperature
chemical_list: D017485:1-Deoxynojirimycin