Abstract

A novel device has been developed which permits sampling at atmospheric pressure followed by soft ionization mass spectrometry. Sample gases are introduced through a small aperture at atmospheric pressure into an ionization reaction chamber containing a lithium ion emitter. In this ionization reaction chamber, lithium ion attachment to the molecule takes place. The ionized adduct is detected by a quadrupole mass spectrometer. With this instrument incorporating soft ionization, it should be possible at atmospheric pressure to detect any chemical species, including radical intermediates, on a real time basis

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