Abstract
Abstract The in-beam EIMS and SIMS of three quaternary ammonium chlorides of benzylamine derivatives have been examined, and their fragmentation processes have been clarified by means of the B⁄E costant and B2⁄E constant linked scanning techniques. The B⁄E constant linked scan of the benzyltrimethylammonium ion (m⁄z 150) in the in-beam EIMS indicated a fragment ion at m⁄z 126 as a daughter ion. A substitution reaction between the m⁄z 150 ion and a chlorine atom in the first field free region is proposed. The characteristics of SIMS of those compounds were demonstrated in comparison with those of EIMS and the fragmentation processes of the salts upon Xe+ bombardment were established based on the linked scanning techniques.
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