The OSU Stable Isotope Laboratory (SIL) is located in the College of Earth, Ocean and Atmospheric Science (CEOAS).

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.

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