摘要
In the ores of low-grade platinum deposits, the platinum concentration is very low(average Pt content 【1 μg. g<sup>-1</sup>), and the platinum minerals often occur as micron grains,thus making it difficult to study the platinum distribution oniy by routine tools, such aselectron microprobes or optic microscopes. As a result, the research and exploitation ofthese deposits in our country is hampered by the lack of more powerful tools.
基金
Project supported by the National Natural Science Foundation of China
the Mountain-Climbing Project of the State Commission of Science and Technology
