Isotope Ratio Lab

 

The Isotope Ratio Mass Spectrometry Laboratory was established as a Core Lab in 2013 when Dr. Schoeller along with two Senior Research Specialists, Tim Shriver, M.S. and Natalie Racine, moved their laboratory from Nutritional Sciences to the Biotechnology Center. The IRMS Core Laboratory specializes in the measurement of natural abundance and low enrichments of the stable isotopes of the light elements of hydrogen, carbon, nitrogen, and oxygen in bulk gases, liquids and solids after their conversion to water, carbon dioxide or nitrogen gas.  The relative abundances of 2H/1H, 13C/12C, 15N/14N, 18O/16O are measured with precisions capable of detecting part-per-million differences in the heavy isotope abundances that are valuable to identify biological origins or trace biological pathways.  The laboratory has particularly strong experience in nutritional applications of stable isotopes including the measurement of energy expenditure by doubly labeled water, energy substrate oxidation using stable isotope labeling, or food webs using unlabeled, natural abundance.

 

Contact information:
Dale Schoeller
      dschoell@nutrisci.wisc.edu        
608-262-1082 

Tim Shriver, M.S.
tshriver@wisc.edu
608-263-5477

Natalie Racine  
nracine@wisc.edu
608-263-5477