title: Surface-activated chemical ionization combined with electrospray ionization and mass spectrometry for the analysis of cannabinoids in biological samples. Part I: analysis of 11-nor-9-carboxytetrahydro-cannabinol.
abstract: Recently, electrospray ionization mass spectroscopy (ESI-MS) has been widely used for the identification of drugs of abuse and their metabolites in biological samples. However, the sensitivity and selectivity of this technique are commonly inadequate for the analysis of tetrahydrocannabinol (THC) and its metabolites at very low levels, such as those sometimes required in forensic and clinical-legal applications. We coupled electrospray ionization and surface-activated chemical ionization (ESI-SACI) to various types of mass analyzers (ion trap, triple quadrupole and orbitrap) (ESI-SACI-MS) to improve the detection of 11-nor-9-carboxy-tetrahydrocannabinol (THC-COOH), the most common marker of THC abuse. The benefits of this approach in terms of sensitivity and selectivity compared with a common ESI-MS approach are clearly demonstrated.
authors: Laboratory of Clinical Pharmacology and Toxicology, S. Maria delle Croci Ravenna Hospital, Viale Randi 5, Ravenna, IT 48100, Italy. matteo.conti@teletu.it
authors: Matteo
authors: M
authors: Conti
authors: Valeria
authors: V
authors: Tazzari
authors: Maria
authors: M
authors: Bertona
authors: Maura
authors: M
authors: Brambilla
authors: Paolo
authors: P
authors: Brambilla