Inorganic Geochemistry

Thermal Ionization Mass Spectrometer (TIMS)

Thermal Ionization Mass Spectrometer (TIMS)

Thermal ionization mass spectrometer (TIMS) is used for isotope analyses of various geological samples. In TIMS, a salt of the element, chemically separated from the sample, is evaporated onto the metal filament (rhenium, tantalum, tungsten, etc.). The filament is heated at high vacuum, and the emitted ions of the element are separated on the basis of their mass using a magnetic sector mass analyzer. Then the separated ion beam is detected by Faraday cup.
Model
TRITON TI
Manufacture
Thermo Fisher Scientific. Inc.
Operating condition
TRITON equips nine Faraday cups, which allows simultaneous measurement of the intensities of several ions beams.  From the intensities of the ions beams, ratios of different masses are calculated to obtain precise isotope ratios of the sample.
Application
  • Precise isotope analyses of strontium (87Sr/86Sr) in carbonates, sediments, rocks and natural waters.  Low level of strontium, as small as 10 ng, is possible to measure.
  • Precise isotope analyses of neodymium (143Nd/144Nd) in sediments and rocks.  Low level of neodymium, as small as 10 ng, is possible to measure.
  • Precise isotope analyses of boron (11B/10B) in carbonates, sediments, rocks and natural waters (analytical technique in development).
Lab.
Inorganic Geochemistry

Isotope Ratio Mass Spectrometer (IR-MS)

Isotope Ratio Mass Spectrometer (IR-MS)

This Mass Spectrometer is for isotopic analyses of carbonates, the acid dissolution for use with solid or gas samples to study O, N, and C, isotopes.
Model
Thermo-Finnigan MAT 253 Mass Spectrometer
Manufacture
Thermo Fisher Scientific. Inc.
Operating condition
This instrument is equipped with a dual inlet system: a) a external system for purified gas samples collected by "Kiel device III" and b) a gear system for up to 24 small samples with automatic tube crackers.
Lab.
Inorganic Geochemistry

IsoPrime

安定同位体比質量分析計

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Model
IsoPrime
Manufacture
Isoprime Ltd
Operating condition
   
   
   
   
Publications Harada, N., Ahagon, N., Sakamoto, T., Uchida, M., Ikehara, M., and Shibata, Y., Rapid fluctuation of alkenone temperature in the southwestern Okhotsk Sea during the past 120 kyr, Global and Planetary Change, 53, 29-36 (2006).
Kameo, K., Okada, M., El-Masry, M., Hisamitsu, T., Saito, S., Nakazato, H., Ohkouchi, N., Ikehara, M., Kitazato, H., and Taira, A., An age model and physical properties of the upper Quaternary core sediments in the Choshi area, central Japan, and their paleoceanographic significance, The Island Arc, 15 (3), 366-377 (2006).
Sakamoto, T., Ikehara, M., Uchida, M., Aoki, Shibata, Y., K., Kanamatsu, T., Harada, N., Iijima, K., Katsuki, K., Asahi, H., Takahashi, K., Sakai, H., Kawahata, H., Millennial-scale variations of sea-ice expansion in the southwestern part of the Okhotsk Sea during 120 kyr: Age model, and ice-rafted debris in IMAGES Core MD01-2412, Global and Planetary Change, 53, 58-77 (2006).
Lab.
Inorganic Geochemistry

Atomic Absorption Spectrometer

原子吸光光度計

Atomic absorption spectroscopy is a technique for determining the concentration of a particular metal element in a sample. The technique typically makes use of a flame or graphite furnace to atomize the sample. The electrons of the atoms in the atomizer can be promoted to higher orbitals for an instant by absorbing a set quantity of energy. This amount of energy is specific to a particular electron transition in a particular element.  This gives the technique its elemental selectivity.
Model
AAnalyst800
Manufacture
PerkinElmer Japan
Operating condition
Direct determination for Alkaline and Alkaline earth elements
Lab.
Inorganic Geochemistry
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