Standard material or certified reference standard resource library is an important part of the national measurement system. It is an essential material condition for scientific research and analytical testing. It is an indispensable functional material and basic material for the development of new technologies. It is also a national natural science and technology resource. An important part of. The development of China's national geological standards began in the 1970s, and currently has more than 300 national first- and second-level geological mineral standards, but so far there is no single-mineral micro-area (micron) element-isotope analysis. standard material.
High-quality micro-element-isotope geochemical reference materials are the basis for high-level micro-area in situ isotope geochronology and geochemical analysis. In the past ten years, universities and scientific research institutions in the field of earth sciences in China have introduced a large number of modern in-situ elements-isotope geochemical analytical instruments (such as large-scale ion probes and laser probes-plasma mass spectrometers). A group of high-level micro-area in situ isotope geochronology and geochemical analysis research laboratories, but all face serious problems of micro-element-isotope geochemical standards, which can only rely on a small amount of international standard materials or working standards. Work in a limited area.
Researcher Li Xianhua from the Institute of Geology and Geophysics of the Chinese Academy of Sciences led the researchers of the Ion Probe Laboratory to successfully develop the micro-region through seven years of efforts under the support of the National "863 Program" and the National Key Laboratory of Lithospheric Evolution. Calcium CO isotope and zircon Hf-O isotope analysis standard, obtained the national first-level reference material certificate issued by the General Administration of Quality Supervision, Inspection and Quarantine (standard substance name: calcite oxygen and carbon isotope micro-analysis standard material (No.: GBW04481) and zirconium The standard material for the analysis of the rock osmium isotope micro-area (No. GBW04482) has achieved the breakthrough of the national standard substance “zero†in the isotope analysis of mineral micro-areas in China. At the same time, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China also issued the “Ministry of the People's Republic of China Manufacturing Measurement Instruments License†to the Institute of Geology and Geophysics of the Chinese Academy of Sciences, indicating that the geological earth's standard material production conditions, product quality and measurement and legal management have reached The relevant provisions of the Measurement Law of the People's Republic of China.
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