Abstract
A supercritical fluid chromatographic method with UV detection (SFC–UV) for the quantitative separation of phenylisothiocyanate (PITC)-derivatised amphetamines is described and compared to high-performance liquid chromatography–diode array detection (HPLC–DAD), gas chromatography–flame ionisation detection (GC–FID) and capillary zone electrophoresis–diode array detection (CZE–DAD) analyses of amphetamine and related compounds. Difficulties in the analysis of common amphetamines by SFC are discussed. Of the methods described in this paper, the SFC method offered the greatest sensitivity at 0.01–0.02 μg of drug on column. Suggestions are made for the use of combinations of these techniques for the identification of amphetamines when gas chromatography–mass spectrometry is not available.
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