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
- Agilent HPLC with
fluorescence detector, for analysis of
sulfur intermediates and other liquid phase
- 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 here.
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.