Dissolved Inorganic Carbon (DIC) and Dissolved Organic Carbon (DOC) via TOC-IRMS
Click here to access a pdf copy (152 Kb) of the TOC-IRMS
poster
presented at
NABS 2003, in Athens, GA, May 27th-June 1st, 2003.
Click here to access a pdf copy (208 Kb) of the TOC-IRMS poster
presented at NABS 2004, in Vancouver, BC, June 6th-June 10th, 2004.
Water samples are analyzed for stable isotopes (13C) and concentration
(ppm C) data on DIC and/or DOC from the same vial using an O.I.
Analytical Model 1010 TOC analyzer interfaced to a Finnigan DELTAplus XL isotope-ratio mass spectrometer (St.
Jean 2003). The autosampler
on the TOC analyzer requires that samples be filtered and collected
in ICHEM 200 series 40-ml glass bottles (Cat no. 246-0040). Preservation
methods depend on whether DIC and/or DOC are to be analyzed from
the same vial. Currently, we use a saturated solution of HgCl2
to preserve samples (Kaplan 1994).
Click here to view a simplified protocol for sample collection
for TOC-IRMS.
Or, contact the lab manager for more information.
References
Kaplan, L.A. 1994. A field and laboratory procedure to collect,
process, and preserve freshwater samples for dissolved organic
carbon analysis. Limnology and Oceanography 39: 1470-1476.
St.
Jean, G. 2003. Automated quantitative and isotopic (13C) analysis
of dissolved inorganic carbon and dissolved organic carbon in continuous-flow
using a total organic carbon analyser. Rapid Communications in
Mass Spectrometry 17: 419-428.
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