Abstract
A double quadrupole mass spectrometer has been constructed to study unimolecular and collision-induced dissociation products from mass-selected ions. The two quadrupoles are closely coupled and the dissociation products sampled from a 2.5-mm interquadrupole region. Spectra obtained on the double quadrupole instrument are compared with published data obtained with triple quadrupole and reversed-sector (MIKE) mass spectrometers. The results indicate that the simple double quadrupole spectrometer is a highly efficient device which is a viable alternative to more complex quadrupole or sector instruments for obtaining dissociation spectra of mass-selected ions.
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