title: [Influence of several excipients on damp-proof performance of pharmaceutical materials of traditional Chinese medicine].
abstract: OBJECTIVE
  To study the influence of several excipients on damp-proof performance of pharmaceutical materials of traditional Chinese medicine.
  
  
  METHODS
  The moisture absorption rate and parameters of hydroscopicity were used as the evaluation index of the damp-proof property of the complex Chinese medicine and preparation 1 and 2.
  
  
  RESULTS
  The moisture rate of complex Chinese medicine 1 was 62.54%, the critical relative humidity (CRH) was 38%. The moisture rate of complex Chinese medicine 2 was 16.36%, the CRH was 53%. Excipients had different effect on lower the hyproscopic property of complex Chinese medicine 1 and 2. The initial moisture adsorption velocity of excipients of complex Chinese medicine 1 in a ascending order were dextrin < calcium hydrogen phosphate < micro crystalline cellulose < lactose < ethyl cellulose < mannitol < hydroxypropyl methyl cellulose. The moisture adsorption acceleration of excipients in a ascending order were dextrin = calcium hydrogen phosphate = micro crystalline cellulose < mannitol = ethyl cellulose = lactose < hydroxypropyl methyl cellulose. The moisture adsorption rate of excipients in a ascending order were dextrin < lactose < calcium hydrogen phosphate < ethyl cellulose < micro crystalline cellulose < mannitol < hydroxypropyl methyl cellulose. The initial moisture adsorption velocity of excipients of complex Chinese medicine 2 in a ascending order were mannitol < dextrin < calcium hydrogen phosphate < lactose < ethyl cellulose < micro crystalline cellulose < hydroxypropyl methyl cellulose . The moisture adsorption acceleration of excipients in a ascending order were mannitol = dextrin = calcium hydrogen phosphate < lactose < ethyl celluloselactose < micro crystalline cellulose < hydroxypropyl methyl cellulose. The moisture adsorption rate of excipients in a ascending order were mannitol < dextrin < calcium hydrogen phosphate < lactose < ethyl cellulose < micro crystalline cellulose < hydroxypropyl methyl cellulose.
  
  
  CONCLUSIONS
  The choosing of damp-proof excipients of preparation based on the property of the complex traditional Chinese medicine. The study provided experimental evidences for the research and development of the pharmaceutical materials of traditional Chinese medicine.
authors.affiliation: Institute of Chinese Materia Medica, China Academy of Chinese Medical Science, Beijing 100700, China.
authors.forename: Xiao-Qin
authors.initials: XQ
authors.lastname: Yin
authors.forename: Jia-Yin
authors.initials: JY
authors.lastname: Xu
authors.forename: Lin-Jiao
authors.initials: LJ
authors.lastname: Du
authors.forename: Yan-Jun
authors.initials: YJ
authors.lastname: Chen
mesh_terms: D000042:Absorption; D004365:Drugs, Chinese Herbal / Q000737:chemistry*; D005079:Excipients / Q000737:chemistry*; D006813:Humidity; D008516:Medicine, Chinese Traditional
chemical_list: D004365:Drugs, Chinese Herbal; D005079:Excipients