he Sample Preparation Method for the Determination of Si Isotopic Abundances Ratios using Gas-source Mass-spectrometry
LI Hong1,YI Hong2,ZHANG Jing-chang1,YI Wei3
1. College of Science, Beijing University of Chemical Technology, Beijing 100029, China
2. National Institute of Metrology, Beijing 100013, China
3. The Hong Kong University of Science and Technology, Kowloon, Hong Kong, China
Abstract：The development of sample preparation for the determination of Si isotopic abundances ratios with gas-source mass-spectrometry is introduced.The single crystal silicon is converted to SiO2 based on alkaline solution digestion followed by cation-exchange column and calcinating at 850 ℃.After dissolving SiO2 with HF acid, H2SiF6 solution is obtained .BaSiF6 precipitation is formed by drop adding BaCl2 solution.Then BaSiF6 is decomposed to SiF4 and Si isotope ratios is measured by gas-source mass-spectrometry.By Optimizing the sample preparation procedure,high recovery SiF4 gas is obtained.The results indicate that the sample preparation method for the determination of Si isotopic abundances ratios has high repeatability and recovery, meeting the requirement for the accurate measurement of silicon molar mass.
李红,易洪,张敬畅,易未. 气体同位素比值质谱法测定硅同位素丰度比的样品制备方法研究[J]. 计量学报, 2011, 32(5): 474-477.
LI Hong,YI Hong,ZHANG Jing-chang,YI Wei. he Sample Preparation Method for the Determination of Si Isotopic Abundances Ratios using Gas-source Mass-spectrometry. Acta Metrologica Sinica, 2011, 32(5): 474-477.
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2011, Vol. 32 
