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Novel sample-substrates for the determination of new psychoactive substances in oral fluid by desorption electrospray ionization-high resolution mass spectrometry
Stockholm University, Faculty of Science, Department of Environmental Science and Analytical Chemistry. Università di Parma, Italy.ORCID iD: 0000-0002-0789-3812
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Number of Authors: 122019 (English)In: Talanta: The International Journal of Pure and Applied Analytical Chemistry, ISSN 0039-9140, E-ISSN 1873-3573, Vol. 202, p. 136-144Article, review/survey (Refereed) Published
Abstract [en]

A reliable screening and non invasive method based on the use of microextraction by packed sorbent coupled with desorption electrospray ionization-high resolution mass spectrometry was developed and validated for the detection of new psychoactive substances in oral fluid. The role of different sample substrates in enhancing signal intensity and stability was evaluated by testing the performances of two polylactide-based materials, i.e. non-functionalized and functionalized with carbon nanoparticles, and a silica-based material compared to commercially available polytetrafluorethylene supports. The best results were achieved by using the non-functionalized polylactide substrates to efficiently ionize compounds in positive ionization mode, whereas the silica coating proved to be the best choice for operating in negative ionization mode. LLOQs in the low mu g/L, a good precision with CV% always lower than 16% and RR% in the 83( +/- 4)-120( +/- 2)% range, proved the suitability of the developed method for the determination of the analytes in oral fluid. Finally, the method was applied for screening oral fluid samples for the presence of psychoactive substances during private parties, revealing mephedrone in only one sample out of 40 submitted to analysis.

Place, publisher, year, edition, pages
2019. Vol. 202, p. 136-144
Keywords [en]
Sample-substrates, New psychoactive substances, Desorption electrospray ionization, High resolution mass spectrometry
National Category
Analytical Chemistry
Identifiers
URN: urn:nbn:se:su:diva-170760DOI: 10.1016/j.talanta.2019.04.057ISI: 000472693700015PubMedID: 31171161OAI: oai:DiVA.org:su-170760DiVA, id: diva2:1338760
Available from: 2019-07-24 Created: 2019-07-24 Last updated: 2019-12-04Bibliographically approved

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Riboni, NicolòIlag, Leopold L.
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