Freeman Research Group
Isotopic Biogeochemistry
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Our organic labs

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In the Deike Building, we have a large lab with 20 linear feet of hood space, and facilities for sample storage, grinding, extraction and compound class separation.

Our isotope mass spectrometers

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We have two mass spectrometers for compound-specific isotope analyses.  Shown is our charter instrument.  She boasts the best sensitivity in the neighborhood! 

GC/MS

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our bench-top GC/MS is used daily to characterize compounds and screen samples prior to quantitative and isotopic analysis.

HPLC/MS

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The HPLC/MS has an ion-trap analyzer with soft ionization (ACPI and EI).  The HPLC separate compounds for isotopic analysis by nano-EA/IRMS.

Automated Solvent Extraction

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The ASE is widely used for extracting compounds from all types of sample matrices.  We are now developing ASE methods for automated compound class separation.

Nano-EA/IRMS

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Our nano-EA/IRMS inlet allows nano molar analyses of solid samples.  We use this for pigments, lipids and micro fossils.  The IRMS also hosts our GC/pyrolysis inlet for molecular deuterium analyses.