Stable Isotope Analysis Services

SIRFER provides stable isotope ratio analyses for H, C, N, O, and S on both organic and inorganic samples. We serve investigators in anthropology, biology, chemistry, ecology, geology, and medicine.

Carbon & Nitrogen Analysis (EA-IRMS)

Method

Elemental Analyzer (EA) coupled to Isotope Ratio Mass Spectrometer (IRMS) in continuous flow mode

Measures

δ¹³C and δ¹⁵N ratios in organic and inorganic solids

Sample Types

  • Plant tissues and organic materials
  • Soils and sediments
  • Food samples
  • Inorganic materials

Sample Preparation Requirements

  • Dried and ground to <40 mesh
  • Routine weighing: 0.2-20 mg in tin capsules
  • Samples weighed to 1 µg precision
  • SIRFER can grind samples for a nominal fee

Special Capabilities

  • USDA/APHIS approved for regulated soils
  • Can process foreign plant samples with permits
  • Accepts isotopically enriched samples (contact manager)
EA-IRMS equipment setup

Hydrogen & Oxygen Analysis (Water Isotopes)

Method

Laser spectroscopy (IRIS) or continuous flow isotope ratio mass spectrometry (CF-IRMS)

Measures

δ²H and δ¹⁸O ratios of water

Sample Types

  • Groundwater and surface water
  • Precipitation and snow
  • Beverages
  • Leaf water and organic water
  • Marine and estuarine samples

Shipping Requirements

Styrofoam containers or coolers with cooling pads or dry ice; overnight shipping preferred

Additional Isotope Services

Sulfur (S)

Stable sulfur isotope analysis for sediments, minerals, and organic materials

Bulk & Trace Gas Analysis

Isotope ratio infrared spectrometry (IRIS) for bulk and trace gas measurements

Compound-Specific Analysis

Analysis of specific compounds within complex mixtures for detailed isotopic signatures

Quality & Expertise

Since 1986, SIRFER has operated as an open facility providing stable isotope ratio analyses with the latest technology and expert research staff. We are committed to providing high-quality sample preparation and analysis in support of science and management across a wide range of fields including anthropology, biology, chemistry, ecology, geology, and medicine.

We serve the University of Utah community and also offer analytical services to researchers from outside the university.