title: [Study on preparation of Qixian decoction pellets in tangential spray fluid bed].
abstract: OBJECTIVE
  To prepare Qixian decoction pellets.
  
  
  METHODS
  The formulation and technological factors influencing the preparation of Qixian decoction were investigated in tangential spray fluid bed choosing the yield of pellets, particle diameter distribution, repose angle, bulk density as inspecting indexes.
  
  
  RESULTS
  the technological parameters for the preparation of blank pellets were as follows: the ratio of starch and dextrin was 2:1, the adhesive agent was 70% syrup, the rotating speed was 200 r x min(-1), the air blow flow was 15 x 20 L x min(-1), the rate of air flow was 15 L x min(-1), the spay air pressure was 0.15 MPa, and the rotating rate of spray solution pump was 20-50 r x min(-1); The optimized technological parameters for the preparation of Qixian decoction were as follows: the relative density of the extract was 1.12-1.15 g x min(-1), the diluent was MCC and its quantity was 8%, the rotating rate of spray solution pump was 10-12 mL x min(-1), the frequency of the rotor disc was 18-20 Hz, the atomizing pressure was 0.2 MPa, the frequency of the fan was 22 Hz, and the spheronisation and drying time was 30 mins.
  
  
  CONCLUSIONS
  the appearance of the Qixian decoction pellets prepared in tangential spray fluid bed are smoothing and round, the yield of pellets are high, and pellets of the particle size between 500-700 microm is 90.6%.
authors.affiliation: National Pharmaceutical Engineering Center for Solid Preparation in Chinese Herbal Medicine, Nanchang 330006, China. luoxj98@126.com
authors.forename: Xiaojian
authors.initials: X
authors.lastname: Luo
authors.forename: Guosong
authors.initials: G
authors.lastname: Zhang
authors.forename: Fengrong
authors.initials: F
authors.lastname: Huang
authors.forename: Xiaoyong
authors.initials: X
authors.lastname: Rao
authors.forename: Yan
authors.initials: Y
authors.lastname: He
authors.forename: Pengyi
authors.initials: P
authors.lastname: Hu
mesh_terms: D000269:Adhesives / Q000737:chemistry; D004339:Drug Compounding / Q000295:instrumentation / Q000379:methods*; D004343:Drug Implants; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D012399:Rotation; D013696:Temperature; D013997:Time Factors
chemical_list: D000269:Adhesives; D004343:Drug Implants; D004365:Drugs, Chinese Herbal; C543118:qixian