TY - JOUR
T1 - Development and validation of a chiral LC-MS/MS method for the separation and quantification of four synthetic cathinones in human whole blood and its application in stability analysis
AU - Aldubayyan, Abdulaziz A.
AU - Castrignanò, Erika
AU - Elliott, Simon
AU - Abbate, Vincenzo
N1 - Funding Information:
The authors would like to thank the Central Military Laboratory and Blood Bank at Prince Sultan Military Medical City for supporting this research project. The authors would also like to acknowledge the Drug Control Center at King's College London and TicTac Communications for kind donation of several reference standards.
Funding Information:
The authors would like to thank the Central Military Laboratory and Blood Bank at Prince Sultan Military Medical City for supporting this research project. The authors would also like to acknowledge the Drug Control Center at King's College London and TicTac Communications for kind donation of several reference standards.
Publisher Copyright:
© 2022 The Authors
PY - 2023/2/1
Y1 - 2023/2/1
N2 - Synthetic cathinones, a subclass of new psychoactive substances, have gained high popularity on the recreational drugs market over the past years. These drugs typically have a chiral center, so they may exist as two stereoisomers. Therefore the pharmacological, pharmacokinetic or metabolic properties of their enantiomers are expected to differ. However, these drugs are often synthesized and sold as a racemic mixture, and as a consequence, differentiation of their (R)- and (S)- enantiomers is relevant in clinical and forensic toxicology. Information about single enantiomers of synthetic cathinones is relatively scarce due to challenges of their chiral analysis. Hence, a sensitive and reliable liquid chromatography-tandem mass spectrometry method was developed and validated for the chiral separation and quantification of four synthetic cathinones in human whole blood samples. The method was fully validated in terms of linearity, limit of detection, limit of quantification, bias, precision, carryover, interferences, matrix effects, recovery and processed sample stability and successfully applied to evaluate the stability as well as enantioselective degradation of synthetic cathinones enantiomers under various storage conditions. For most of the analytes, significant enantioselective degradation was observed when stored at room temperature or refrigerated, with the E2-enantiomers observed to more rapidly degrade under both conditions. This is the first report concerning the stability and enantioselective degradation of synthetic cathinone enantiomers in whole blood. Moreover, the inversion study demonstrated enantiomeric inversion of R-(−)- and S-(+)-methylenedioxypyrovalerone (MDPV) in human whole blood and methanolic solution.
AB - Synthetic cathinones, a subclass of new psychoactive substances, have gained high popularity on the recreational drugs market over the past years. These drugs typically have a chiral center, so they may exist as two stereoisomers. Therefore the pharmacological, pharmacokinetic or metabolic properties of their enantiomers are expected to differ. However, these drugs are often synthesized and sold as a racemic mixture, and as a consequence, differentiation of their (R)- and (S)- enantiomers is relevant in clinical and forensic toxicology. Information about single enantiomers of synthetic cathinones is relatively scarce due to challenges of their chiral analysis. Hence, a sensitive and reliable liquid chromatography-tandem mass spectrometry method was developed and validated for the chiral separation and quantification of four synthetic cathinones in human whole blood samples. The method was fully validated in terms of linearity, limit of detection, limit of quantification, bias, precision, carryover, interferences, matrix effects, recovery and processed sample stability and successfully applied to evaluate the stability as well as enantioselective degradation of synthetic cathinones enantiomers under various storage conditions. For most of the analytes, significant enantioselective degradation was observed when stored at room temperature or refrigerated, with the E2-enantiomers observed to more rapidly degrade under both conditions. This is the first report concerning the stability and enantioselective degradation of synthetic cathinone enantiomers in whole blood. Moreover, the inversion study demonstrated enantiomeric inversion of R-(−)- and S-(+)-methylenedioxypyrovalerone (MDPV) in human whole blood and methanolic solution.
UR - http://www.scopus.com/inward/record.url?scp=85139591952&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2022.123986
DO - 10.1016/j.talanta.2022.123986
M3 - Article
SN - 0039-9140
VL - 253
JO - TALANTA
JF - TALANTA
M1 - 123986
ER -