COMPUTER-BASED MASS MEASUREMENT OF FRAGMENT ION SPECTRA FROM TANDEM MAGNETIC-SECTOR MASS SPECTROMETERS WITH AN ELECTRICALLY FLOATED COLLISION CELL

Methodology is described whereby fragment ion spectra, obtained from tandem magnetic sector mass spectrometers, may be acquired, mass-measured, and processed by using standard computer-based data systems. The mass spectrometers may be single or double focusing, and the collision cell in which the precursor ions are collisionally activated may be floated from ground potential. The technique has been evaluated with a tandem double-focusing mass spectrometer to investigate fragmentations of ions derived from perfluorokerosene (electron ionization) and from sodium iodide (fast atom bombardment ionization).