Analytical chemistry

Along with the advancement of the latest technology, analytical methods in geochemistry and cosmochemistry have improved dramatically in the last decade, including chemical separation of elements and high-precision isotopic measurements with TIMS and ICP-MS. Our goal is to construct a system that can obtain comprehensive geochemical dataset from a small-size sample with higher accuracy adn precision.

Related papers

Yokoyama, T., Fukai, R., Nakahara, M.

Separation of heavy lanthanoids by flash column chromatography for precise determination of Er and Yb isotope compositions in rock samples.
Geostandards and Geoanalytical Research, 44, 265-285, 2020.

Fukai, R., Yokoyama, T.

Assessment of the secondary instrumental fractionation in TIMS: Implication for high-precision Nd isotope analysis of geological samples.
Geochemical J., 2019. 53, 333-337.

Nakanishi, N., Yokoyama, T., Ishikawa, A.

Refinement of the micro-distillation technique for isotopic analysis with pg-level Os in geologic samples.
Geostandard. Geoanal. Res., 43, 231-243, 2019.

Yokoyama, T., Nagai, Y., Hinohara, Y. and Mori, T.

Investigating the influence of nonspectral matrix effects for determination 22 trace elements in rock samples by ICP-QMS.
Geostandards and Geoanalytical Research, 41 (2), 221-242, 2017.