The University of Tokyo · Earth and Planetary Sciences
Professor Wenshuai Li's research lab specializes in geochemical and analytical techniques, focusing on the development of advanced methods for precise isotope ratio measurements. The lab emphasizes lithium isotope analysis using multi-collector and single-collector ICP-MS, with innovations in sample purification through dual-column systems. It also explores the speciation and local electronic structure of elements like potassium and calcium using XANES spectroscopy, particularly in complex geological materials. The overarching goal is to improve the accuracy of isotope geochemistry for tracing geological processes such as weathering and fluid-rock interactions.
Figures are computed from collected data and may differ slightly.
The lithium isotope system can be an important tracer for various geological processes, especially tracing continental weathering. The key to this application is the accurate and precise determination of lithium isotopic composition. However, some of the previously established column separation methods are not well behaved when applied to chemically diverse materials, due to the significant variations in matrix/lithium ratios in some materials. Here, we report a new dual‐column system for lithiu
This study develops and optimizes a new method to measure lithium isotope ratios using a single collector quadrupole inductively coupled plasma mass spectrometer (Q-ICP-MS) operated under hot plasma (1550 W) conditions.
Potassium (K) and calcium (Ca) K ‐edge X‐ray adsorption near‐edge (XANES) spectroscopy were performed on thirty‐three chemical compounds and geological materials, including chemical reagents, organometallic compounds, silicates, carbonates and igneous rock reference materials. The results confirm that the fine structure of the K ‐edges for specimens is unique and distinguishable. The results suggest that compositional and local atomic variations strongly regulate spectral characteristics. Acquir
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