Stable Isotope Research Facility

Stable Isotope Research Facility (SIRF)

The Stable Isotope Research Facility (SIRF) in the Department of Earth and Atmospheric Sciences houses four isotope ratio mass spectrometers dedicated to analysis of hydrogen, carbon, nitrogen, oxygen, and sulfur. Since 2009, SIRF has occupied space in the new Multidisciplinary Science Building II, where it continues a long tradition of serving faculty, students, and visitors to Indiana University, as well researchers from other institutions.

  • Thermo Electron MAT253 with a fluorination line as inlet, dedicated to the study of multiple isotopes of sulfur (32S, 33S, 34S, 36S) as SF6
  • Thermo Delta V with an Elemental Analyzer inlet for 34S/32S analysis
  • Thermo Finnigan Delta Plus XP with dual inlet, Gas Bench, Elemental Analyzer, TC/EA, and GC, for the analysis of isotopes of hydrogen, carbon, nitrogen, and oxygen in a wide range of materials
  • Finnigan MAT252 for the analysis of carbon and oxygen
Focus areas

The Stable Isotope Research Facility employs a range of continuous-flow inlets for the analysis of solid, liquid, and gas samples. These include two Costech ECS4010 Elemental Analyzers for solid and liquid samples (carbon, nitrogen, and sulfur), a ThermoFinnigan Gas Bench for carbonate minerals, waters, and air samples, and two Thermo Trace Ultra GCs for compound-specific isotope analysis. The MAT253, Delta Plus XP, and MAT252 are configured with variable volume dual-inlets for materials prepared off-line. In addition, SIRF houses a methane preconcentrator inlet for the hydrogen and carbon isotopic analysis of methane, ethane, and propane.

Man reaching behind glass panel to manipulate lab equipment
Lab space full of mechanical equipment and computers
Mechanical lab equipment

Contact information

We welcome inquiries from faculty, students, and professionals. Fees are charged for analytical services.

For further information contact:

Mailing address

SIRF Laboratory
Department of Earth and Atmospheric Sciences
Indiana University
702 N. Walnut Grove Room 001A
Bloomington, IN 47405-1405 U.S.A.