title: [Removal of plumbum ion from the extract of Lonicera japonica by gamma-mercaptopropyl-modified silica gel].
abstract: OBJECTIVE
  To remove plumbum ion from the extract of Lonicera japonica by gamma-mercaptopropyl-modified silica gel (MPS).
  
  
  METHODS
  The reference plumbum ion solution was added into the extract of L. japonica as the tested samples. The static and dynamic adsorptions were investigated to evaluate the influent factors on the removal of plumbum ion in the extract. The solid content and HPLC profiles of the extract were determined to evaluate the process changes.
  
  
  RESULTS
  MPS showed excellent adsorption charateristics to remove plumbum ion from the extract of L. japonica, with fast adsorption rate and more than 80% removal efficiency. The optimum parameters were as follows: 6 times sample volume, 10 times of height to diameter, and 6 BV x h(-1) of flow velocity, at the temperature of 25 degrees C. During the removal process, obvious changes of solid content and HPLC profiles were not observed.
  
  
  CONCLUSIONS
  MPS could be used to remove plumbum ion from extract of L. japonica.
authors.affiliation: Institute of Chinese Materia Medica, China Academy of Chinese Medical Sciences, Beijing 100700, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Zhao
authors.forename: Zhimin
authors.initials: Z
authors.lastname: Wang
authors.forename: Huimin
authors.initials: H
authors.lastname: Gao
authors.forename: Qiwei
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D002851:Chromatography, High Pressure Liquid; D007854:Lead / Q000737:chemistry* / Q000302:isolation & purification*; D031239:Lonicera / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry*; D058428:Silica Gel / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D007854:Lead; D058428:Silica Gel