State Key Laboratory of Environmental Geochemistry;
Institute of Geochemistry;
Chinese Academy of Sciences;
Guiyang 550081;
China;
University of Chinese Academy of Sciences;
Beijing 100049;
China;
Beijing 21st Century International School;
Beijing 100014;
China;
State Key Laboratory of Geological Processes and Mineral Resources;
China University of Geosciences;
Beijing 100083;
China;
Isotope; dilution; method; Error; propagation; Mento; Carlo; Se; concentration; Geological; reference; materials;