Abstract
WE have found that the distillation of chloroform, carbon tetrachloride, methyl alcohol and benzene leads, surprisingly enough, in all four cases to an enrichment of carbon-13 in the distillate, whereas the other heavy isotopes, such as chlorine-37 and oxygen-18, are enriched in the still pot.
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BAERTSCHI, P., KUHN, W. & KUHN, H. Fractionation of Isotopes by Distillation of some Organic Substances. Nature 171, 1018–1020 (1953). https://doi.org/10.1038/1711018a0
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DOI: https://doi.org/10.1038/1711018a0
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