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.
Conclusion: The results indicated that the element contents could be stable in healthy human lung tissues in 4 cities.