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Differentiation of ring-substituted regioisomers of amphetamine and methamphetamine by supercritical fluid chromatography.
Drug Testing and Analysis 2017 March
Chromatographic differentiation of the ring-substituted regioisomers of amphetamine (AMP) and methamphetamine (MA) was performed by supercritical fluid chromatography (SFC). The behaviour of the retention against the changes of column temperature and co-solvent proportion was studied. The obtained information facilitated the optimization of the each regioisomer. As a result, 2-, 3-, and 4-ring-substituted analogues of AMP and MA with methyl, methoxy, fluoro, chloro, and bromo groups were separated, generally within 6 min. In addition, we found that the separation pattern of the examined regioisomers was classified into two, which depended on the electron donating/withdrawing effect of the substituent. Our results indicate that SFC could be used in forensic drug analysis for fast, reliable identification of structurally similar drugs of abuse. Copyright © 2016 John Wiley & Sons, Ltd.
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