We routinely support CSIA of 13C in n-alkanes. n-Alkanes dissolved in hexane are injected in splitless mode and separated on an SGE BP5 column (30m X 0.25mm ID, 0.25 micron film thickness). Once separated, n-alkanes are quantitatively converted to CO2 in an oxidation reactor at 950°C. Following water removal through a nafion dryer, CO2 enters the IRMS. Delta 13C values are corrected using laboratory reference materials (RMs) composed of n-alkane mixtures that are calibrated against NIST standard reference materials. Additional RMs are included within each batch to provide quality assurance.
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UC Davis Stable Isotope Facility | Department of Plant Sciences
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