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Stable Isotope Facility

University of Wyoming


δ2H and δ18O of Organic and Inorganic Materials

Oxygen and hydrogen containing compounds occur in both organic (such as plants and animals) and inorganic (such as soils) systems.   δ18O and δ2H ratios of these materials can be determined by the analysis of the CO and H2 generated by the pyrolysis of the material.  The technique used to generate CO and H2 is called temperature conversion elemental analysis (TC/EA).  In this method, solid samples are placed into silver capsules and then dropped into a TC/EA generating the product gases.  These gases (CO, H2) are separated using a gas chromatograph, sent to an open split interface and then to the IRMS for analysis (TC/EA-IRMS).

Typical sample size:    100-200 μg

TCEA shematic

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Stable Isotope Facility

Berry Center RM 214

Laramie, WY 82071

Phone: (307) 766-6373


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1000 E. University Ave. Laramie, WY 82071
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