Concentration of the trace contaminants during gas chromatographic and chromatographic mass spectrometric analysis in biomedical research
Ivanov, V.I.; Ivanov, A.N.; Gaziev, G.A.; Kobzeva, L.I.
Kosmicheskaia Biologiia i Aviakosmicheskaia Meditsina 13(1): 62-64
1979
ISSN/ISBN: 0321-5040 PMID: 423519 Document Number: 146172
In the search for methods to concentrate contaminants from exhaled air and environmental gases in chromatographic and mass spectrographic studies, selective sorbents and concentration conditions were tested. In studies of the kinetics of CO2 emission with exhaled air, a more sensitive gas chromatographic method was developed employing transformation of CO2 to methane and subsequent measurement of the methane with a flame-ionization detector. Sensitivity of amine determination in the exhaled air was enhanced by preliminary concentration of the contaminants by evaporation of the absorbed solution in a vacuum. In gas chromatograph mass spectrometry analysis of mixtures of organic substances emitted from polymer materials, a collector was devised to enhance sensitivity of the apparatus to aromatic compounds (benzene, toluene, styrene) by 5 .times. and widen the possibility of identification of separate components.