Stable isotope lab

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.

Methods and techniques:

  • R. Tanaka and E. Nakamura (2017). Silicate-SiO reaction in a protoplanetary disk recorded by oxygen isotopes in chondrules, Nature Astronomy, 1, 0137.
  • R. Tanaka and E. Nakamura (2013). Determination of 17O-excess of terrestrial silicate/oxide minerals with respect to Vienna Standard Mean Ocean Water (VSMOW), Rapid Communications in Mass Spectrometry, 27(2), 285-297.

  • Stable Isotopes Laboratory - Spherical Image - RICOH THETA

    Stable Isotopes Laboratory
    Stable Isotopes Side Room

    Technical Utilities

    • Thermo Scientific MAT253 IRMS
    • TC/EA
    • Flash2000
    • Gas Bench II
    • GC-C
    • Fluorination system
    • Flame emission/atomic absorption spectrometer (Shimadzu AA-6200 equipped with autosampler ASC-6100F)
    • Clean fume food (Yamato CYG120)
    • Dry ovens (Iuchi LDO-450S, Advantec VO-230, AsOne AVO-250N)
    • Centrifugal (AsOne CN-1040N)

    Analytical Capabilities

    • 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

    Related Work