Abstract
Respiratory mass spectrometers have been developed for a continuous determination of several gas components in inspiratory and expiratory air. The first generation of this kind of mass spectrometers is represented by the type M3 of Varian MAT (Fig. 1). It is a mass spectrometer with a 180° magnetic sector having four collectors to determine four different components of a gas mixture simultaneously. Its sensitivity is 10 ppm and its resolution about 25. For some years a second generation of respiratory mass spectrometers with magnetic deflection has been available. They represent an improvement in their stability of measurement and operating conditions but are of decreased sensitivity. Some mass spectrometers of the quadrupole type have a sensitivity up to 0.2 ppm but there may arise problems in measuring two components with very different abundances simultaneously. Respiratory mass spectrometers are well suitable to analyse the major components of air but they are not suitable for the measurement of isotopic abundance.
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© 1979 Plenum Press, New York
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Schuster, KD., Pflug, KP., Förstel, H., Pichotka, J.P. (1979). Adaptation of Respiratory Mass Spectrometer to Continuous Recording of Abundance Ratios of Stable Oxygen Isotopes. In: Frigerio, A. (eds) Recent Developments in Mass Spectrometry in Biochemistry and Medicine. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3018-9_34
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DOI: https://doi.org/10.1007/978-1-4613-3018-9_34
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