title: [Study on water-soluble iron, heavy metals and harmful elements of Magnetitum].
abstract: OBJECTIVE
  To measure the contents of the water-soluble iron, five heavy metals and harmful elements in Magnetiturn and provide a basis for the quality control and safety evaluation of Magnetitum.
  
  
  METHODS
  Iron (Fe), lead (Pb), cadmium (Cd) and copper (Cu) were determined by atomic absorption spectrometry (AAS); arsenic (As) and mercury (Hg) were determined by atomic fluorescence spectrometry (AFS).
  
  
  RESULTS
  The mean content of element iron is 764.30 mg x kg(-1). The contents of five water-soluble heavy metals and harmful elements in Magnetitum were within the safety range. The recovery of the standard addition was in the range of 93.7% - 110.6%, and the RSD was less than 5.0%.
  
  
  CONCLUSIONS
  Analyzing the water-soluble iron, heavy metals and harmful elements in Magnetitum is effective to the quality control and the safety evaluation of magnetitum.
authors: Nanjing University of Chinese Medicine, Nanjing 210046, China.
authors: Xingsheng
authors: X
authors: Fu
authors: Xunhong
authors: X
authors: Liu
authors: Ruichao
authors: R
authors: Lin
authors: Hu
authors: H
authors: Xu
authors: Yizhi
authors: Y
authors: Zhou
authors: Dekang
authors: D
authors: Wu
authors: Shengjin
authors: S
authors: Liu
mesh_terms: D007501:Iron / Q000378:metabolism*; D008419:Materia Medica / Q000737:chemistry*; D019216:Metals, Heavy / Q000378:metabolism*; D012995:Solubility; D013054:Spectrophotometry, Atomic
chemical_list: D008419:Materia Medica; D019216:Metals, Heavy; D007501:Iron