Elemental and isotope compositions of H, C, N, and O from inorganic and organic materials can be analysed in this laboratory.
Flame esmission (FA) and atomic absorption (AA) are useful methods to determine trace amounts of metals (alkali, alkali earth, and transition metals) in geological and environmental materials. Samples were decomposed in chemical laboratories, and diluted to desired concentrations. Digested sample solution is nebulized and introduced into the flame to atomize elements. The emitted radiation power is measured by photodetector in FA mode, while adsorption of optical radiation is measured in AA mode.
Isotope and compositional analyses of H, C, N, and O
Flame emission mode: Determination of potassium abundance for K-Ar dating [0.5–1.5 ppm with uncertainty less than 1% (1σ)]
Rapid analyses with automated sample exchange (10 samples in an hour)
Atomic absorption mode: Determination of trace amounts of Cd in industrial and laboratory wastes
Tanaka, R., Nakamura, E., Silicate-SiO reaction in a protoplanetary disk recorded by oxygen isotopes in chondrules, Nature Astronomy, 1, 0137, 2017.
Pack, A., Tanaka, R., Hering, M., Sengupta, S., Peters, S., Nakamura, E., The oxygen isotope composition of San Carlos olivine on the VSMOW2-SLAP2 scale., Rapid Commun. Mass Spectrom., 30 1495-1504, 2016.
Tanaka, R., Nakamura, E., Determination of 17O-excess of terrestrial silicate/oxide minerals with respect to Vienna Standard Mean Ocean Water (VSMOW), Rapid Commun. Mass Spectrom., 27, 285-297, 2013
Nakao, A., Nakao, A., Tanaka, R., Ogasawara, S., Yanai, J., Aeolian-Dust-Derived Micaceous Minerals Control Radiocesium Retention in Andosols in Japan, Soil Sci. Soc. Am. J., 79, 1590-1600, 2015.
Rehman, Ur. H., Tanaka, R., O'Brien, J.P., Kobayashi, K., Tsujimori, T., Nakamura, E., Yamamoto, H., Khan, T., Kaneko, Y., Oxygen isotopes in Indian Plate eclogites (Kaghan Valley, Pakistan): Negative δ18O values from a high latitude protolith reset by Himalayan metamorphism, Lithos, 471-483, 208-209, 2014.
Singerling, S.A., Modi, A.L., McFerrin,B., Worsham, E. A., McSween, H. Y., Rumble, D. Tanaka, R., Taylor, L. A., Two new eucrite breccias from Northwest Africa, Meteoritics Planet. Sci., 48, E1-E9, 2013
Eguchi, T., Tanaka, R., Maejima, Y., Tamura, K., The influence of Aeolian dust in non-allophanic Andosols on Yakushima Island, Soil Sci. Plant Nutr., 58, 191-199, 2012
Nakamura, E., Makishima, A., Moriguti, T., Kobayashi, K., Tanaka, R., Kunihiro, T., Tsujimori, T., Sakaguchi, C., Kitagawa, H., Ota, T., Yachi, Y., Yada, T., Abe, M., Fujimura, A., Ueno, M., Mukai, T., Yoshikawa, M., Kawaguchi, J., Space environment of an asteroid preserved on micrograins returned by the Hayabusa spacecraft, PNAS Plus, 109(11), E624-E629, 2012.
Feyssia, D.H., Shinjo, R., Kitagawa, H., Meshesha, D., Nakamura, E. Petrologic and geochemical characterization of rift-related magmatism at the northernomst Main Ethiopian Rift: Implications for plume-lithosphere interaction and the evolution of rift magma sources. Lithos, 282-283 (2017), 240–261 (http://dx.doi.org/10.1016/j.lithos.2017.03.011).