The Stable Isotope Laboratory (SIL) is 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 operates six gas-source isotope ratio mass spectrometers (i.e., two Thermo Fisher MAT 253+, two ThermoFisher DeltaV-Plus, and two Thermo DeltaPlus-XL instruments) connected to a variety of peripherals (i.e., two Kiel-IV carbonate prep. devices, a GasBench, a Water Equilibration system, and an Elemental Analyzer). We analyze natural abundances of C, N, O and H isotopes in a variety of environmental, geological and biological sample types.