A laser extraction/combustion technique for in situ δ 13C analysis of organic 
and inorganic materials

Wieser, M. E.; Brand, W. A.

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A laser extraction/combustion technique for in situ δ ¹³C analysis of organic and inorganic materials

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Brand, W. A.
Service Facility Stable Isotope/Gas Analytics, Dr. W. A. Brand, Max Planck Institute for Biogeochemistry, Max Planck Society;

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Wieser, M. E., & Brand, W. A. (1999). A laser extraction/combustion technique for in situ δ ¹³C analysis of organic and inorganic materials. Rapid Communications in Mass Spectrometry, 13(13), 1218-1225.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-CC2D-6

Abstract

A CO₂ laser extraction system is described for in situ delta(13)C analysis of organic and inorganic materials. Carbonaceous compounds volatilized by the laser are quantitatively converted to CO₂ gas by a combustion furnace mounted after the sample chamber. Gases produced by the laser and combustion processes are swept by helium carrier gas and separated by a packed gas chromatography column prior to their introduction to an isotope ratio monitoring mass spectrometer. A sample of lentil bean was analyzed at a spatial resolution of 200 mu m and yielded delta(13)C values with precision of +/-0.3 parts per thousand. The accuracy of delta(13)C measurements was better than +/-0.5 parts per thousand from NBS 22 (mineral oil), USGS 24 (graphite), and IAEA CO-1 (calcium carbonate). Copyright (C) 1999 John Wiley & Sons, Ltd. [References: 9]