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27.09.2018 | Original Article

Simultaneous chiral impurity analysis of methamphetamine and its precursors by supercritical fluid chromatography–tandem mass spectrometry

verfasst von: Hiroki Segawa, Yuko T. Iwata, Tadashi Yamamuro, Kenji Kuwayama, Kenji Tsujikawa, Tatsuyuki Kanamori, Hiroyuki Inoue

Erschienen in: Forensic Toxicology | Ausgabe 1/2019

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Abstract

Purpose

Impurity profiling of seized illicit methamphetamine (MA) provides information on MA manufacturing methods in clandestine laboratories, and this drug intelligence supports formulation of strategies to control MA abuse. In the present study, we developed a simultaneous chiral analysis method for MA and its precursors using supercritical fluid chromatography–tandem mass spectrometry equipped with an enantioselective stationary phase.

Methods

Chromatographic conditions were optimized by systematic investigation of the flow rate, temperature, back pressure, co-solvent, additive, and mobile phase composition. The ability of the developed method was evaluated using standard and authentic illicit MA.

Results

The use of a chiral selector in the stationary phase allowed for simultaneous chiral differentiation of MA and its precursors including ephedrine, norephedrine, chloropseudoephedrine, methylephedrine, dimethylamphetamine, and amphetamine. Sufficient limit of detection, repeatability of retention time, and linearity were achieved. A switching valve interfacing a chromatograph and a mass spectrometer enabled analyzing large amounts of MA directly. The application to the authentic illicit MA samples was achieved and revealed the existence of impurities, which was not detected by conventional gas chromatography–mass spectrometry.

Conclusions

The developed supercritical fluid chromatography–tandem mass spectrometry method could be a powerful analytical tool for MA impurity profiling.

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Titel: Simultaneous chiral impurity analysis of methamphetamine and its precursors by supercritical fluid chromatography–tandem mass spectrometry
verfasst von: Hiroki Segawa
Yuko T. Iwata
Tadashi Yamamuro
Kenji Kuwayama
Kenji Tsujikawa
Tatsuyuki Kanamori
Hiroyuki Inoue
Publikationsdatum: 27.09.2018
Verlag: Springer Japan
Erschienen in: Forensic Toxicology / Ausgabe 1/2019
Print ISSN: 1860-8965
Elektronische ISSN: 1860-8973
DOI: https://doi.org/10.1007/s11419-018-0446-5

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