Sample Material Measure out 5.00g sample material with a universal balance and put it into a centrifugal tube.
  30ml acetonitrile
  Stir it for 1 minute with a rotary evaporator.
  Clean the rotation axis with some acetonitrile.
  Centrifugation at speed of 2,500r/min for 5 minutes.
 
Acetonitrile Layer      
  Cotton Cork
Filtration
Residue  
   
  30ml acetonitrile
   
  Stir it for 1 minute with a rotary evaporator.
   
  Clean the rotation axis with some acetonitrile.
   
  Centrifugation at speed of 2,500r/min for 5 minutes.
 
    Acetonitrile Layer  
   
  Cotton Cork Filtration   Residue
 
  60ml acetonitrile and saturation ethane respectively.
  Vibrate it for 5 minutes.
 
Acetonitrile Layer Ethane Layer  
  10ml propyl alcohol
  Decompression & condensation £¨ below 40 ¡æ £©£¬ dry solidification ( nitrogen flow £©
  Methyl-alcohol-and-water mixed liquor (1 £º 1) (contain 0.1 £¥ vitamin C) 5ml transfer pipet
  (Dissolve by ultrasound, MESOBURAIRUTA0.45um) filtration
       
High Performance Liquid Chromatograph