New Quartz And Zircon Si Isotopic Reference Materials For Precise And Accurate SIMS Isotopic Microanalysis

Here we report the Si isotope compositions of four potential reference materials, including one fused quartz glass (Glass-Qtz), natural (Qinghu-Qtz), and two zircons (Qinghu-Zir Penglai-Zir), suitable for in-situ isotopic microanalysis. Repeated SIMS (Secondary Ion Mass Spectrometry) analyses demonstrate that these materials are more homogeneous in isotopes (with spot-to-spot uncertainty 0.090-0.102‰), compared with widely used NIST RM 8546 (previously NBS-28) standard poorer than 0.16‰). Based on solution-MC-ICP-MS determination, recommended