Thermal ionization mass spectrometer with retarding potential quadrupole
（Finigan-MAT262 RPQ）
Used for U-Th-Ra isotope analyses (Yokoyama et al.,1999a,b,2000, Yokoyama and Nakamura, 2004).
Thermal ionization mass spectrometer（Finigan-MAT262）
Used for Re and Os isotope analysis on the negative mode.
Thermal ionization mass spectrometer（Finigan-MAT261 modified）
Used for Li (Moriguti and Nakamura, 1998), B (Nakamura et al., 1992; Nakano and Nakamura, 1998), Pb(Kuritani and Nakamura, 2003), and Ce (Makishima and Nakamura, 1991) isotope analyses.
Thermal ionization mass spectrometer（Finigan-MAT262）
Used for Rb-Sr (Yosikawa and Nakamura, 1993), Nd-Sm (Shibata et al.,1989) and Pb (Kuritani and Nakamura, 2003) isotope analyses
Q-pole type Inductively Coupled Plasma Mass Spectrometer (Agilent 7500cs)
Renewed Q-pole ICP-MS from old YOKOGAWA PMS-2000. Used for quantitative analyses for B, Li, REE, Rb, Sr, Y, Zr, Nb, Mo, Cs, Ba, REE, Hf, Ta, W, Pb, Th, and U in geological materials (after Makishima and Nakamura, 1997; Makishima et al., 1997, 1999).
High Resolution Inductively Coupled Plasma Mass Spectrometer
(Finnigan MAT Element equipped with flow injection system)
Used for quantitative analyses of Na, Mg, Al, P, K, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn in geological materials.
Isodynamic separator, Heavy liquid separation system, and Binocular and Polarizing microscope equipped with high resolution CCD Camera
All tools (beakers, bottles etc.) are washed in this room. The deionized water flows from a tap and acid waste fluid discharges into the sink.
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Reagents are purified in a closed, subboiling distillation system. The system is positioned on a clean bench to minimize contamination.
Three high-precision electrical balances are located in this room. In order to avoid static electricity, the floor and stone tables are covered with grounded, conducting sheets. Air flows through the static eliminator at all times.
Sample preparation for ICP-MS analyses, B separations, and final sample loading for TIMS analyses are performed in this room.
Sample preparations for isotope analyses are performed in this room. There are nine clean benches and eight clean evaporators.
Periodic table indicating the elements we can analyze for isotopic ratio (in red) and concentration analyses (in blue).
Before entering the laboratory, all individuals are cleaned of dust by this system. Air showers are located in two lab entrances.
Used for sample dissolutions and evaporations. Clean air flows through a HEPA filter.
Sample preparation for B isotope analysis is performed in this boron-free air system.
Sample preparation for ICP-MS, TIMS analyses are performed on this clean bench. Clean air flows from back to front after filtration by a HEPA filter.
Automatic Dicing/Cutting Saw (disco DAD-522)
Geological materials can be cut into slices (down to 50 micrometers thick) with saw widths between 20 and 60 maicromaeters.
Heavy liquid separations are undertaken in this draft chamber.
The acid waste fluids are poured into a sink, then discharged into a neutralization tank positioned outside the building.