The Stable Isotopes for Biosphere Science (SIBS) lab at Texas A&M University conducts stable isotopic analysis of organic and inorganic materials. These include plant tissues across spatial and temporal gradients, animal tissues with different origins or from different species, soils recording carbon and nitrogen cycle processes, water from throughout the hydrologic cycle, and atmospheric gases that participate in many biosphere processes.

The lab focuses on research efforts led by the laboratory’s associated scientists, but also provides analyses of outside samples. Samples are analyzed using Isotope Ratio Mass Spectrometry and Laser Spectroscopy approaches. Carbon (δ13C), nitrogen (δ15N), sulfur (δ34S), hydrogen (δ2H) and oxygen (δ18O) isotope ratio analyses are routinely conducted in the laboratory.

Check our new service fees and prompt turnaround time (


Laboratory Directors


  • MAT253 Plus IRMS, GC IsoLink II, ISQ
  • Delta V Advantage IRMS, Elemental Analyzer
  • Conflo IV, TCEA
  • GasBenchII, Precon
  • Delta V Advantage IRMS, EA IsoLink CNOHS
  • Cavity Ring-Down Optical Spectrometer (13C)

Contact Us

Dept. of Ecosystem Science and Management
Rm 215 Kleberg Center
2126 TAMU, Texas A&M University
College Station TX 77843-2126

Back to top