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Analyses Directions

Gas Source - Mass Spectrometry I (CHEM 0233) is equipped with ThermoFinnigan Delta Plus and MAT 253 mass spectrometers. This facility is supervised by James Farquhar.  Funding for this laboratory was provided by NSF, NASA, ACS and the University of Maryland.

  • The ThermoFinnigan Delta Plus is dedicated to simultaneous analysis of 17O/16O and 18O/16O using molecular oxygen as the analyte is presently configured for dual inlet analyses with capabilities for on-line pyrolysis of nitrate and a dedicated inlet for laser fluorination using a Synrad CO2 laser.
  • The ThermoFinnigan MAT 253 is dedicated to simultaneous analysis of 33S/32S, 34S/32S, and 36S/32S using sulfur hexafluoride as the analyte and an on-line fluorination manifold that can be used for Ni-tube fluorinations of silver sulfide, and CO2 laser fluorination of sulfide minerals.  We are presently developing techniques of in-situ fluorination using a Lambda Physik Compex 110 Excimer laser with KrF fill gas that is coupled to a New Wave beam delivery system and that will be coupled to a continuous flow interface.
  • IR and UV laser capabilities (two Synrad CO2 lasers and one Lambda Physik Compex 110 Excimer laser) for in-situ and low blank isotopic analysis of oxygen and sulfur isotope ratios.
  • Agilent HPLC with fluorescence detector, for analysis of sulfur intermediates and other liquid phase species.

Gas Source - Mass Spectrometry II (CHEM 1216) is equipped with four Micromass/Elementar Isoprime mass spectrometers.  This facility is supervised by Jay Kaufman and Mike Evans.  Funding for this laboratory was provided by NSF MRI, EAR/I&F and the University of Maryland.  Photos and a description of this laboratory, designed and commissioned 2008-2010, are hereContact us about collaborative projects and/or for current availability and pricing for analyses using these systems.

  • IsoPrime 1 is dedicated to dual inlet (DI) measurements, particularly for the automated analysis of large numbers of carbonate (C, O) and water (O, H) samples to high analytical accuracy and precision.  The system includes an automated manifold device for the extraction and sequential measurement of gas samples prepared off-line.
  • Isoprime 2 is equipped with a multicollector and is dedicated to continuous flow (CF) inlet systems coupled with high temperature combustion or reduction ovens for the automated isotopic analysis of organic matter (C, N, S, O, H), as well as mineral sulfates (S, O), sulfides (S), nitrates (N, O), and phosphates (O). Another peripheral that acts as a head space gas extractor will allow for the automated analysis of dissolved inorganic carbon (C) in water, as well as a back up device for additional carbonate and water samples typically run on the DI system.
  • Isoprime 3 is coupled to a Costech Analytical High Temperature Generator and Elemental Combustion System, and is dedicated to continuous flow analysis of C and O on  solid organics.
  • Isoprime 4 is coupled to a customized high-throughput Elemental Multiflow carbonate and water autosampler, and is dedicated to CF analysis of C and O on carbonates and waters.

Chemistry Building, Rms. 0233,0230, 0224, 1212,1214,1216
ph. 301.405.8611 (IRMS lab)
ph. 301.405.1116 (chemistry lab)

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