Progress in Analytical Methods of Tungsten Isotope and Experimental Research on Digestion of Whole Rock Samples
详细信息
- 责任者：Chen Juan (Laboratory for High Temperature and High Pressure Study of the Earth’s Interior ; Institute of Geochemistry ; Chinese Academy of Sciences ; Guiyang 550002 ; China) ; Tang Hongfeng
- 刊名：Journal of Mineralogy and Petrology
- 出版年：2013
- 卷期：33(3)
- 页码：p.86-92
- issnNo：ISSN1001-6872
- isbnNo：CN51-1143/TD
摘要
Based on research progresses review in W isotopic analytical methods and their geologic applications,advantages and disadvantages among different methods for W isotope analysis are compared in this paper.It is pointed out that Multi-Collector Inductively Coupled Plasma Mass Spectrometry(MC-ICPMS)is currently the best instrument for tungsten isotope measurement,and that chemical treatment process is the key step to acquiring W isotopic data with high precision and accuracy.Samples of Lunan meteorite and NIST SRM612 were selected for experimental research on digestion of whole rocks and temperature effect on sample digestion was mainly investigated.The experiments have showed that one week was needed for complete dissolution of the Lunan meteorite at 150℃,whereas only 48hours needed for NIST SRM612 at the same temperature.Meanwhile,the experimental results show that the co-precipitation problem of Ca and Mg with W is relatively difficult to be resolved by adding H2SO4 solution during the digestion process.