Rapid and simple LC-MS/MS-Screening of 64 novel psychoactive substances using dried blood spots

Ambach, Lars; Hernandez, Ana; König, Stefan; Weinmann, Wolfgang (2014). Rapid and simple LC-MS/MS-Screening of 64 novel psychoactive substances using dried blood spots. Drug testing and analysis, 6(4), pp. 367-375. Wiley 10.1002/dta.1505

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The range of novel psychoactive substances (NPS) including phenethylamines,
cathinones, piperazines, tryptamines, etc. is continuously growing. Therefore,
fast and reliable screening methods for these compounds are essential and needed. The use of dried blood spots (DBS) for a fast straightforward approach helps to simplify and shorten sample preparation significantly. DBS were produced from 10 µl of whole blood and extracted offline with 500 µl methanol followed by evaporation and reconstitution in mobile phase. Reversed-phase chromatographic separation and mass spectrometric detection (RP-LC-MS/MS) was achieved within a run time of 10 min. The screening method was validated by evaluating the following parameters: limit of detection (LOD), matrix effect, selectivity and specificity, extraction efficiency, and short-term and long-term stability.
Furthermore, the method was applied to authentic samples and results were
compared with those obtained with a validated whole blood method used for Routine analysis of NPS. LOD was between 1 and 10 ng/ml. No interference from Matrix compounds was observed. The method was proven to be specific and selective for the analytes, although with limitations for 3-FMC/flephedrone and MDDMA/MDEA. Mean extraction efficiency was 84.6 %. All substances were stable in DBS for at least a week when cooled. Cooling was essential for the stability of cathinones.
Prepared samples were stable for at least 3 days. Comparison to the validated
whole blood method yielded similar results. DBS were shown to be useful in
developing a rapid screening method for NPS with simplified sample preparation.
Copyright © 2013 John Wiley & Sons, Ltd

Item Type:	Journal Article (Original Article)
Division/Institute:	04 Faculty of Medicine > Service Sector > Institute of Legal Medicine > Forensic Chemistry and Toxicology
UniBE Contributor:	Ambach, Lars, Hernandez, Ana, König, Stefan (B), Weinmann, Wolfgang
Subjects:	500 Science > 540 Chemistry
ISSN:	1942-7603
Publisher:	Wiley
Language:	English
Submitter:	Katrin Renfer
Date Deposited:	25 Jul 2014 14:05
Last Modified:	29 Mar 2023 23:33
Publisher DOI:	10.1002/dta.1505
PubMed ID:	23868723
URI:	https://boris.unibe.ch/id/eprint/44309