title: [Studies on key processes of Fufang Kushen injection].
abstract: OBJECTIVE
  To study the key processes of Fufang Kushen injection for technical upgrading.
  
  
  METHODS
  Total alkaloids (sum of matrine, oxymatrine, sophoridine and oxysophoridine) and macrozamin were selected as quality evaluation markers. The key processes of percolation with acetic acid and discoloration with activated carbon were optimized by orthogonal experiment design, and process of purification with alcohol was investigated by single factor method.
  
  
  RESULTS
  The optimal condition of percolation process is as follows: the medicinal materials are soaked for 9 h with 4 times water containing 0.8% acetic acid, then percolation starts at flow-rate of 5 mL x min(-1) x kg(-1) and adding 2 times 0.8% acetic acid solution is added at the same velocity. Purification process is that the concentrated solution is precipitated by 60%, 80% and 90% alcohol in turn. Discoloration process is that 6 activated carbon is added into the solution which is heated at 60 degrees C for 20 minutes.
  
  
  CONCLUSIONS
  The optimal extraction process is not only simple, saving the industrial cycle, reducing the potential risk, but also decreasing the acetic acid amount to guarantee the acid-insoluble ash as well as the functional ingredients.
authors.affiliation: Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
authors.forename: Xiaoqian
authors.initials: X
authors.lastname: Liu
authors.forename: Jinyu
authors.initials: J
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Tong
authors.forename: Ruizhen
authors.initials: R
authors.lastname: Wang
authors.forename: Yanxia
authors.initials: Y
authors.lastname: Zhang
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Wang
authors.forename: Qiwei
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D000470:Alkaloids / Q000302:isolation & purification; D004365:Drugs, Chinese Herbal / Q000737:chemistry; D007267:Injections; D010936:Plant Extracts / Q000032:analysis; D013678:Technology, Pharmaceutical; D013696:Temperature
chemical_list: D000470:Alkaloids; D004365:Drugs, Chinese Herbal; D010936:Plant Extracts; C494416:kushen