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Stable isotope ratio mass spectrometers VG PRISM

a picture of VG PRISM

machine specifications:

  • Dual inlet, triple collector IRMS (Isotope Ratio Mass Spectrometer) devoted for 13C/12C and 18O/16O ratio analysis using CO2 as a measuring gas.
  • High precision δ18O and δ13C analysis of silicates and carbonates with precision better than 0.02 ‰. Refer to preparation systems.
  • Sample size is normally 100 µl CO2, but 1 µl CO2 is possible with cold finger.
  • A cracker manifold is attached for autorun of 10 samples.
  • Automated δ18O measurement of water samples (24 samples a day) with precision better than 0.05 ‰.


  • Role of water and CO2 in the study of magmatic hydrothermal systems.
  • Water circulation in the Earth's surface

person(s) whom users should contact: Ryoji TANAKA.