title: [Determination of 33 inorganic elements in human hair by electricity plate digestion and inductively coupled plasma-mass spectrometry].
abstract: OBJECTIVE
  To establish the electricity plate digestion and inductively coupled plasma-mass spectrometry (ICP-MS) method for determination of 33 inorganic elements in human hair.
  
  
  METHODS
  Lithium (6Li), Germanium (72Ge), Yttrium (89Y), Indium (115In), and Terbium (159Tb) were used as internal standards. The electric heating board digestion in a mixture of nitric acid and hydrogen peroxide was used as the pre-treatment of the hair. Thirty-three inorganic elements in human hair were analyzed by ICP-MS method.
  
  
  RESULTS
  The detection limit of ICP-MS was 0.0001 microg/g(Th)-10.9 microg/g (Ca) and the limit of quantitation was 0.0005 microg/g (Th)-25 microg/g (Ca). The recovery rate of this method was 86%-113%. The RSD for the intra-day and inter-day were less than 9.2%. The method was not statistically different from microwave digestion method.
  
  
  CONCLUSIONS
  This method is highly efficient and accurate. It can be used for analysis of 33 inorganic elements in human hair.
authors.forename: Ru-Xin
authors.initials: RX
authors.lastname: Luo
authors.forename: Dong
authors.initials: D
authors.lastname: Ma
authors.forename: Su-Jing
authors.initials: SJ
authors.lastname: Zhang
authors.forename: Xian-Yi
authors.initials: XY
authors.lastname: Zhuo
mesh_terms: D004560:Electricity; D006197:Hair / Q000737:chemistry*; D006801:Humans; D057230:Limit of Detection; D013058:Mass Spectrometry / Q000379:methods*; D008872:Microwaves; D012015:Reference Standards; D012680:Sensitivity and Specificity; D014131:Trace Elements / Q000032:analysis*
chemical_list: D014131:Trace Elements