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The Kentucky Stable Isotope Geochemistry Laboratory is located within the Department of Earth & Environmental Sciences at the University of Kentucky. With three isotope ratio mass spectrometers (IRMSs), five peripherals, and two laser absorption spectrometers, we have the capability to analyze stable isotopes of N, C, H, O, and S in nearly any compound.

We analyze samples on a contract basis, work collaboratively to develop new methods, and host students and researchers from around the world, training the next generation of isotope geochemists.

If you'd like to have samples analyzed or collaborate on a project, contact either Dr. Andrea Erhardt (Director, or Dr. Aaron Shultis (Manager,

For more information about ongoing research, visit the Erhardt Geochemistry Lab website at