Detection of Δ~9-Tetrahydrocannabinol, Methamphetamine and Amphetamine in air at low ppb level using a Field Asymmetric Ion Mobility Spectrometry microchip sensor

摘要

In this work, we report the detection in air of two families of illicit drugs using a high sensitivity portable instrument based on a Field Asymmetric Ion Mobility Spectrometry microchip sensor. Methamphetamine, Amphetamine and Δ~9-Tetrahydrocannabinol (Δ~9-THC) were detected in the vapor phase at atmospheric pressure and a concentration of 12.5, 25 and 65 ppb, respectively. Each target molecule appears at a specific Compensation Voltage (CV) under a fixed Dispersion Field (DF). A linear FAIMS response at different concentrations and low limits of detection were successfully achieved.