LC-MS/MS screening method for designer amphetamines, tryptamines, and piperazines in serum.

Area of Science:

• Forensic Toxicology
• Analytical Chemistry
• Pharmacology

Background:

• The illicit drug market is increasingly flooded with novel psychoactive substances (NPS) and designer drug derivatives.
• These substances pose significant public health risks, leading to widespread intoxications and fatalities.
• Existing screening methods may not adequately cover the rapidly evolving landscape of NPS.

Purpose of the Study:

• To develop and validate a comprehensive liquid chromatography-tandem mass spectrometry (LC-MS/MS) screening method.
• To identify a broad spectrum of 35 designer drugs and new psychoactive compounds.
• To provide a reliable analytical tool for forensic laboratories to detect emerging substances.

Main Methods:

• Development of an LC-MS/MS method using an Applied Biosystems API 365 TurboIonSpray system.
• Sample preparation involved internal standards and mixed-mode solid-phase extraction.
• Chromatographic separation was achieved on a Synergi Polar RP column with gradient elution using ammonium formate and methanol/formic acid mobile phases.

Main Results:

• The method successfully identified all 35 target substances, including amphetamine, tryptamine, and piperazine derivatives.
• The assay demonstrated high selectivity for all tested compounds.
• Limits of detection ranged from 1.0 to 5.0 ng/mL, with extraction efficiencies between 72% and 90%.

Conclusions:

• The presented LC-MS/MS method is a selective and sensitive tool for the identification of a wide range of designer drugs and NPS.
• This assay can aid forensic toxicologists in accurately detecting and quantifying emerging substances in biological samples.
• The method contributes to better monitoring and control of the evolving illicit drug market.