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A UPLC-MS/MS methodological approach for the analysis of 75 phenethylamines and their derivatives in hair.
Journal of Pharmaceutical and Biomedical Analysis 2023 March 26
A rapid ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) method was developed and validated for the targeted analysis of 75 phenethylamines and their derivatives from the hair matrix. The monitored classes of phenethylamines included the 2C series, D series, N-benzyl derivatives, mescaline-derived compounds, MDMA analogs, and benzodifurans. Approximately 20 mg of hair was weighed and pulverized with 0.1% formic acid in methanol by cryogenic grinding. After ultrasonication, centrifugation, and filtration, the supernatant was analyzed by LC-MS/MS operating in the scheduled multiple reaction monitoring mode. Phenethylamines and their derivatives were separated in 13 min on a biphenyl column (2.6 µm, 100 Å, 100 × 3.0 mm) using a gradient eluting mobile phase composed of 0.1% formic acid in water and acetonitrile. The developed and validated method showed good selectivity, sensitivity (LOD: 0.5-10 pg/mg and LOQ: 1-20 pg/mg), linearity (R2 > 0.997), accuracy and precision (< 20%), and stability. The method also showed good recovery and acceptable matrix effects for most of the targeted compounds. This analytical approach was successfully applied for the identification and quantification of phenethylamines in hair from authentic forensic cases.
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