title: [Determination of six heavy metal elements in Zanthoxylum nitidum in twelve habitats of guangxi by ICP-AES].
abstract: OBJECTIVE
  To determine the contents of six heavy metal elements in traditional Chinese medicine of Zanthoxylum nitidum in twelve habitats by ICP-AES.
  
  
  METHODS
  Nitric acid- perchloric acid mixed acid digested system was used to completely decomposed the organic compounds effectually. The As, Cr, Hg, Ni, Cd and Pb were determined by the absorption spectroscopy under set up working conditions.
  
  
  RESULTS
  An efficient, simple and accurate method was established. The recoveries were 90.82%-101.21% and RSDs were within 3.0%.
  
  
  CONCLUSIONS
  The contents of six heavy metal elements are different in Zanthoxylum nitidum from different habitats. As, Cr and Hg were not detected. The content of Pb which from eleven habitats is consistent with the standards of medicine and export except from Nanning habitats, meanwhile the content of Cd all exceeds those standards.
authors.affiliation: The Third Affiliated Hospital of Guangxi Medical University, Nanning 530031, China. wangdongmei067@yahoo.com.cn
authors.forename: Dong-Mei
authors.initials: DM
authors.lastname: Wang
authors.forename: Jie
authors.initials: J
authors.lastname: Feng
authors.forename: Fu-Jing
authors.initials: FJ
authors.lastname: Qin
authors.forename: Yi-Sheng
authors.initials: YS
authors.lastname: Mo
mesh_terms: D001151:Arsenic / Q000032:analysis; D002104:Cadmium / Q000032:analysis; D002681:China; D007854:Lead / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis*; D010598:Pharmacognosy; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry* / Q000254:growth & development; D011786:Quality Control; D012621:Seasons; D013054:Spectrophotometry, Atomic / Q000379:methods*; D032106:Zanthoxylum / Q000737:chemistry* / Q000254:growth & development
chemical_list: D019216:Metals, Heavy; D002104:Cadmium; D007854:Lead; D001151:Arsenic