Analysis of 62 synthetic cannabinoids by gas chromatography–mass spectrometry with photoionizationReport as inadecuate




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Forensic Toxicology

, Volume 35, Issue 1, pp 94–103

First Online: 17 October 2016Received: 13 July 2016Accepted: 24 September 2016DOI: 10.1007-s11419-016-0342-9

Cite this article as: Akutsu, M., Sugie, K. & Saito, K. Forensic Toxicol 2017 35: 94. doi:10.1007-s11419-016-0342-9

Abstract

Gas chromatography–mass spectrometry GC–MS in electron ionization EI mode is one of the most commonly used techniques for analysis of synthetic cannabinoids, because the GC–EI-MS spectra contain characteristic fragment ions for identification of a compound; however, the information on its molecular ions is frequently lacking. To obtain such molecular ion information, GC–MS in chemical ionization CI mode is frequently used. However, GC–CI-MS requires a relatively tedious process using reagent gas such as methane or isobutane. In this study, we show that GC–MS in photoionization PI mode provided molecular ions in all spectra of 62 synthetic cannabinoids, and 35 of the 62 compounds showed only the molecular radical cations. Except for the 35 compounds, the PI spectra showed very simple patterns with the molecular peak plus only a few fragment peaks. An advantage is that the ion source for GC–PI-MS can easily be used for GC–EI-MS as well. Therefore, GC–EI-PI-MS will be a useful tool for the identification of synthetic cannabinoids contained in a dubious product. To the best of our knowledge, this is the first report to use GC–PI-MS for analysis of synthetic cannabinoids.

KeywordsGC–MS Photoionization Synthetic cannabinoids New psychoactive substances Ionization chamber for electron ionization and photoionization in common An erratum to this article is available at http:-dx.doi.org-10.1007-s11419-016-0349-2.

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Author: Mamoru Akutsu - Ken-ichi Sugie - Koichi Saito

Source: https://link.springer.com/







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