Current Research


The Stable Isotope Laboratory (SIL) located in the College of Earth, Ocean and Atmospheric Science (CEOAS) at Oregon State University.

The laboratory was founded in 1986 by director Dr. Alan Mix with a single Finnegan/MAT251 mass spectrometer. Today the laboratory, which is a member of the OSU Mass Spectrometry Consortium, operates five gas-source isotope ratio mass spectrometers (i.e., Thermo Fisher MAT253, Finnigan MAT252, ThermoFisher DeltaV-Plus, and two Thermo DeltaPlus-XL instruments) connected to a variety of peripherals (i.e., two Kiel-III carbonate prep. devices, a GasBench, a Water Equilibration system, two TCEA, two GC's, an EA, and one Precon). We analyze natural abundances of C, N, O and H isotopes in a variety of environmental, geological and biological sample types.

For information about analyzing samples please contact Jennifer McKay (541-737-4054).


Recent Publications

Bauska, T.K., Brook, E.J., Mix, A.C., and Ross, A. (2014) High-precision dual-inlet IRMS measurements of the stable isotopes of CO2 and the N2O/CO2 ratio from polar ice core samples. Atmos. Meas. Tech., 7, 3825-3837.

Praetorius, S. K., and Mix, A. C. (2014). Synchronization of North Pacific and Greenland climates preceded abrupt deglacial warming. Science, 345(6195), 444-448.