title: [Influence of drying method on content of epigoitrin and uridine in isatidis radix].
abstract: OBJECTIVE
  To study the influence of different drying methods on the content of epigoitrin and uridine in Isatidis Radix.
  
  
  METHODS
  Fresh Isatidis Radix was processed by four drying methods including airing drying and drying in far infrared oven at different temperature,drying in the sun and drying in the shade. The contents of epigoitrin and uridine were determined by HPLC.
  
  
  RESULTS
  The contents of epigoitrin as well as uridine in samples valued from 3.847 - 5.204 mg/g and 0.701 - 1.028 mg/g, respectively.
  
  
  CONCLUSIONS
  The optimal drying method is airing drying at 55 degrees C, which will be serviced in the large-scale processing of Isatidis Radix.
authors.forename: Ming-Ming
authors.initials: MM
authors.lastname: Tan
authors.forename: Yong
authors.initials: Y
authors.lastname: Huang
authors.forename: Xiao-Fei
authors.initials: XF
authors.lastname: Xu
authors.forename: Zhuo-Neng
authors.initials: ZN
authors.lastname: Zhang
authors.forename: Qiao-Hua
authors.initials: QH
authors.lastname: Deng
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003890:Desiccation / Q000379:methods*; D031219:Isatis / Q000737:chemistry*; D023303:Oxazolidinones / Q000032:analysis*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013472:Sunlight; D013696:Temperature; D014529:Uridine / Q000032:analysis*
chemical_list: D023303:Oxazolidinones; C004333:goitrin; D014529:Uridine