title: [Detection report on noxious elements in Radix astragli].
abstract: OBJECTIVE
  The contents and dissolution rates of As, Hg, Cd and Pb including 44 batches of Astragali samples from major habitats were analysed.
  
  
  METHODS
  As was determined by hydride generation-AFS. Hg was determined by cold vapour-ASS. Cd and Pb were determined by ICP-ES.
  
  
  RESULTS
  The contents of As, Hg, Cd, Pb were 0.018-0.617 microgram/g, 0.004-0.181 microgram/g, 0.029-0.168 microgram/g, and 0.290-5.501 micrograms/g respectively. The As, Hg, Cd, Pb dissolution rates were 30.2%-54.2%, 4.9%-9.8%, 50.%-87.9%, and 12.6%-27.8% respectively.
  
  
  CONCLUSIONS
  The contents of As, Hg and Cd were very low and below the limitation of national food and hygiene standard, but that of Pb was high in Astragali and its extracts.
authors.affiliation: Hubei Academy of Traditional Chinese Medicine and Pharmacy, Wuhan 430074.
authors.forename: Xiaochuan
authors.initials: X
authors.lastname: Ye
authors.forename: Fen
authors.initials: F
authors.lastname: Deng
authors.forename: Ming
authors.initials: M
authors.lastname: Gu
authors.forename: Yinsheng
authors.initials: Y
authors.lastname: Xiao
authors.forename: Hong
authors.initials: H
authors.lastname: Fang
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Lu
mesh_terms: D001151:Arsenic / Q000032:analysis; D027885:Astragalus propinquus / Q000737:chemistry*; D002104:Cadmium / Q000032:analysis; D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification; D004787:Environmental Pollution; D015590:Fluorophotometry; D007854:Lead / Q000032:analysis; D008628:Mercury / Q000032:analysis; D013054:Spectrophotometry, Atomic; D014131:Trace Elements / Q000032:analysis*
chemical_list: D004365:Drugs, Chinese Herbal; D014131:Trace Elements; D002104:Cadmium; D007854:Lead; D008628:Mercury; D001151:Arsenic