Abstract
We studied the possibility of direct GC-MS determination of amphetamine hydrochloride. In order to avoid the double peak we determined the optimal injector temperature (260°C) and heating rate (40°C min−1). In the direct analysis of amphetamine hydrochloride containing samples, calibration for fragmentm/z=59 (originating from amphetaminium ion fragmentation; the calibrating agent is amphetamine hydrochloride) gave better results than calibration form/z=44 (derived from both free amphetamine and amphetaminium ion; calibration agents were amphetamine or amphetamine hydrochloride). We also compared the mass spectra of amphetamine and amphetamine hydrochloride taken by ion-trap GC-MS. The fragmentation path was cleavage of the C-C bond at benzyl position for the free base or between the phenyl group and the aliphatic moiety, in the case of free base and amphetaminium ion, respectively.
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