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A simplified technique for collecting breath CO 2 for isotope ratio mass spectrometry
Author(s) -
Schoeller D. A.,
Klein P. D.
Publication year - 1978
Publication title -
biomedical mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0306-042X
DOI - 10.1002/bms.1200050106
Subject(s) - isotope , mass spectrometry , chromatography , isotope ratio mass spectrometry , fractionation , chemistry , vacutainer , isotopes of carbon , stable isotope ratio , isotope analysis , analytical chemistry (journal) , geology , physics , nuclear physics , oceanography
A simplified technique of collecting breath CO 2 for isotopic analysis has been developed. The subject breathes into a 3 I bag from which a 50 ml aliquot is transferred to an evacuated, septum‐capped tube (Vacutainer®). The sample is later withdrawn and the CO 2 is cryogenically purified. No isotope fractionation is observed in samples collected in this manner. Samples have been stored up to three months without any change in the isotope ratio.