Abstract
A RECENT article1 takes issue with the “popular belief that the use of hydrogen or helium as the carrier gas in gas chromatography gives the highest sensitivity with a thermal conductivity detector, because the difference in thermal conductivity between organic vapours and hydrogen or helium is greater than for any other carrier gas”. The article goes on to show that, for methane and ethane at least, the sensitivities are considerably higher with carrier gases that have a lower thermal conductivity.
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References
Ray, N. H., Nature, 182, 1663 (1958).
Dimbat, M., Porter, P. E., and Stross, F. H., Anal. Chem., 28, 290 (1956).
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FREDERICKS, E., DIMBAT, M. & STROSS, F. Carrier Gas and Sensitivity in Gas Chromatography. Nature 184, BA54 (1959). https://doi.org/10.1038/184054a0b
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DOI: https://doi.org/10.1038/184054a0b
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