Skip to Main Navigation. Each navigation link will open a list of sub navigation links.

Skip to Main Content

Apply to the University of Wyoming apply now

Global Resource Navigation

Visit Campus
Download UW Viewbook
Give to UW

Stable Isotope Facility

University of Wyoming


Elemental Analyzer (EA-IRMS)

δ13C and δ15N of Organic and Inorganic Material

Carbon and nitrogen containing compounds occur in both organic (such as plants and animals) and inorganic (such as soils) systems.  δ13 and δ15N ratios of the material can be determined by isotopic analysis of the CO2 and N2 generated by the combustion of the material. At SIF, the homogenized sample is accurately weighed into a tin capsule and loaded into the autosampler attached to an elemental analyzer.  The EA is coupled to an IRMS through an open split interface.  When a sample is dropped into the EA, the EA automatically processes the sample, combusting the sample to generate product gases that are then separated using the gas chromatograph.  The separated gases (CO2 and N2) are then pass through the open split interface to the IRMS for isotopic analysis (EA-IRMS).

Typical sample size:    1-2 mg (plant), 0.5-1 mg (animal), 5-20 mg (soil)

Elemental Analyzer Scheme

Share This Page:

Contact Us

Stable Isotope Facility

Berry Center RM 214

Laramie, WY 82071

Phone: (307) 766-6373


SIF Logo

1000 E. University Ave. Laramie, WY 82071
UW Operators (307) 766-1121 | Contact Us | Download Adobe Reader

Twitter Icon Youtube Icon Instagram Icon Facebook Icon

Accreditation | Virtual Tour | Emergency Preparedness | Employment at UW | Gainful Employment | Privacy Policy | Harassment & Discrimination | Accessibility Accessibility information icon