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Light Stable Isotope Laboratories

The laboratories house 4 mass spectrometers and a range of preparation systems.

A newly refurbished laboratory houses 3 IsoPrime mass spectrometers.

  1. Continuous He-flow to analyse:
    • δ13C and δ18O of DIC in waters by multiflow
    • δ18O by equilibration of the water itself by multiflow
    • δ13C and δ15N of rocks, minerals, soil and vegetation by Elementar MicroCube EA
  2. Continuous He-flow to analyse:
    • δ13C and δ18O of carbonates by multiflow
    • dD of waters by Cr-reduction
  3. Dual inlet mass spectrometry to analyse:
    • δ13C and δ18O of small sample carbonates (20-200µg)
    • multicollector capabilities to measure masses 47 and 48 in carbonates

A second lab houses our oldest mass spectrometer a 1994 Optima dual inlet mass spectrometer. This has the following preparation systems attached to it:

  • LaserPrep, designed and built at RHUL for laser heating of minerals in an atmosphere of BrF5 to release oxygen for the measurement of 18O/16O and 17O/16O ratios.
  • Fisons NCS1500 elemental analyser for flash combustion of rocks, soils and vegetation in an oxygen atmosphere to release CO2, N2 or SO2 for isotopic analysis.




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