Fast and Sensitive Method for the Determination of 17 Designer Benzodiazepines in Hair by Liquid Chromatography-Tandem Mass Spectrometry

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DeFreitas, LauraCUNY, NY 10019 USA; Columbia Univ, NY 10032 USA (författare)

Fast and Sensitive Method for the Determination of 17 Designer Benzodiazepines in Hair by Liquid Chromatography-Tandem Mass Spectrometry

Artikel/kapitelEngelska2022

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2022-06-24
OXFORD UNIV PRESS INC,2022
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LIBRIS-ID:oai:DiVA.org:liu-187516
https://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-187516URI
https://doi.org/10.1093/jat/bkac044DOI

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Språk:engelska
Sammanfattning på:engelska

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In recent years, identification and analysis of designer benzodiazepines have become a challenge in forensic toxicology. These substances are analogs of the classic benzodiazepines, but their pharmacology is not well known, and many of them have been associated with overdoses and deaths. As a result, there has been a surge in efforts to develop analytical methods to determine these compounds in different biological samples. Our aim was to develop and validate a fast, sensitive and specific method for determining 17 designer benzodiazepines (adinazolam, clobazam, clonazolam, delorazepam, deschloroetizolam, diclazepam, etizolam, flualprazolam, flubromazepam, flubromazolam, flunitrazolam, N-desmethylclobazam, nifoxipam, nitrazolam, meclonazepam, pyrazolam and zolazepam) in hair by liquid chromatography-tandem mass spectrometry (LC-MS-MS). Hair samples were decontaminated and pulverized, and a 20 mg aliquot was incubated in methanol in an ultrasound bath (1 h, 25 degrees C). The supernatant was evaporated and reconstituted in 200 mu L of mobile phase, and the extracts were filtered (nano-filter vials) before injection into LC-MS-MS. All analytes were eluted from the chromatographic column in 8 min, and two multiple-reaction monitoring (MRM) transitions were used to identify each compound. The limits of quantification were 5 or 25 pg/mg depending on the analyte, and the calibration functions were linear to 200 pg/mg. Imprecision was <19.2% (n = 15), and bias was from -13.7 to 18.3% (n = 15). All the analytes yielded high extraction efficiencies >70% and displayed ion suppression between -62.8% and -23.9% (n = 10). The method was applied to 19 authentic cases. Five samples were positive for flualprazolam ( 200 pg/mg) and/or etizolam (47.4-88.5 pg/mg). In conclusion, the present validated method has proven to be fast, sensitive, specific and capable of determining 17 designer benzodiazepines in hair using LC-MS-MS.

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Fonseca Pego, Ana MiguelCUNY, NY 10019 USA (författare)
Kronstrand, Robert,1966-Linköpings universitet,Avdelningen för klinisk kemi och farmakologi,Medicinska fakulteten,Natl Board Forens Med, Dept Forens Genet & Forens Toxicol, S-58758 Linkoping, Sweden(Swepub:liu)robkr41 (författare)
Lendoiro, ElenaUniv Santiago de Compostela, Spain (författare)
De Castro-Rios, AnaUniv Santiago de Compostela, Spain (författare)
Concheiro, MartaCUNY, NY 10019 USA (författare)
CUNY, NY 10019 USA; Columbia Univ, NY 10032 USACUNY, NY 10019 USA (creator_code:org_t)

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Ingår i:Journal of Analytical Toxicology: OXFORD UNIV PRESS INC46:8, s. 852-8590146-47601945-2403

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Av författaren/redakt...: DeFreitas, Laura; Fonseca Pego, An ...; Kronstrand, Robe ...; Lendoiro, Elena; De Castro-Rios, ...; Concheiro, Marta

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Av lärosätet: Linköpings universitet

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