Isotopomers 12CO2 and 13CO2 absorbed into polystyrene films provide narrow, sharp, and well-resolved IR absorption bands for the î3 antisymmetric stretching mode. This is exploited to set up an inexpensive FT-IR-based method for the measurement of the carbon isotope ratio. Accuracy of 2.5‰ ä13C units is readily achieved already at a low resolution of 2 cm-1.
Determination of 13C/12C Carbon Isotope Ratio
ZANASI, Riccardo;ALFANO, DAVIDE;MOTTA, ORIANA;PROTO, Antonio
2006-01-01
Abstract
Isotopomers 12CO2 and 13CO2 absorbed into polystyrene films provide narrow, sharp, and well-resolved IR absorption bands for the î3 antisymmetric stretching mode. This is exploited to set up an inexpensive FT-IR-based method for the measurement of the carbon isotope ratio. Accuracy of 2.5‰ ä13C units is readily achieved already at a low resolution of 2 cm-1.File in questo prodotto:
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