title: [Quantitative analysis and comparison of 56 element contents in normal human lung tissues of 4 cities].
abstract: OBJECTIVE
  To determine element contents in normal human lung tissue and compare their differences between districts.
  
  
  METHODS
  Total 56 elements in 16 normal human lung tissues of 4 cities were detected by ICP-MS, ICP-AES and GF-AAS, and the measurement accuracy and precision were estimated.
  
  
  RESULTS
  All element determination values of national standard reference materials were in accord with the certified or reference values, the recovery rates were in the rang of 95% - 110%, and the RSD of most elements are less than 10%. The method is proved accurately and crediblely. The similar distributions of elements in lung samples of 4 cities were found in the study. Except 6 elements (Cu, Rb, Ge, Ce, Hg and Pb), the significant differences of the contents of all 50 measured elements were not observed between 4 cities.
  
  
  CONCLUSIONS
  The results indicated that the element contents could be stable in healthy human lung tissues in 4 cities.
authors.affiliation: School of Public Health, Peking University, Beijing 100083, China. rebzeng@gmail.com
authors.forename: Jing
authors.initials: J
authors.lastname: Zeng
authors.forename: Li
authors.initials: L
authors.lastname: Ouyang
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Wang
authors.forename: Yaqiong
authors.initials: Y
authors.lastname: Liu
mesh_terms: D000328:Adult; D002681:China; D002947:Cities; D004602:Elements; D006801:Humans; D008168:Lung / Q000737:chemistry*; D008297:Male; D013058:Mass Spectrometry / Q000379:methods; D008875:Middle Aged; D012016:Reference Values; D014131:Trace Elements / Q000032:analysis; D014505:Urban Population; D055815:Young Adult
chemical_list: D004602:Elements; D014131:Trace Elements