Rapid and ultra-sensitive GC/MS analyses with a microchannel plate array detector. Part I: possibilities of simultaneous ion detection in narrow-bore GC/MS

P.A. Leclercq, H.M.J. Snijders, C.A.M.G. Cramers, K.H. Maurer, U. Rapp

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Samenvatting

Identification and detection limits for scanning and non-scanning mass spectrometers are discussed. It is theoretically deduced and experimentally confirmed that these limits are on the low pico-and femtogram levels, respectively, when using conventional secondary electron multiplier-amplifier systems. The sensitivity can be increased at least tenfold by pulse-counting techniques, instead of current amplification, provided the chemical noise is sufficiently low. The potential advantages of a detection system for simultaneous ion detection in a significant mass range, for obtaining complete mass spectra in fast GC/MS analyses, are demonstrated. A double focusing mass spectrometer was constructed, using the well-proven Mattauch-Herzog principles. By application of an electronic photoplate, substance identification in the low femtogram range on a millisecond time scale, so far only accessible for single ion monitoring techniques, is feasible
Originele taal-2Engels
Pagina's (van-tot)652-656
TijdschriftJournal of High Resolution Chromatography
Volume12
Nummer van het tijdschrift10
DOI's
StatusGepubliceerd - 1989

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