Abstract
The analysis of cannabinoids in blood samples is still a challenging issue for forensic laboratories,because of the low concentrations to be determined to prove that a person acted under CannabisTherefore, sensitive analytical techniques are required.This study presents the development and validation of a novel APGC-MS/MS method for the simultaneous determination of Δ9-tetrahydrocannabinol (THC), 11-hydroxy- Δ9-THC (THC−OH), 11-nor-9-carboxy- Δ9-THC (THCA), cannabidiol (CBD), cannabidiol acid (CBDA) and cannabigerol (CBG) in human serum.The developed method was fully validated according to international guidelines, with evaluation of selectivity, precision, accuracy, linearity, LODs and LOQs, extraction recovery and matrix effect. The method was linear in the range 0.2–25 ng/mL for THC, THC−OH, CBD and CBG, while for THCA and CBDA linearity was assessed in the range of 0.8–100 ng/mL and 3–100 ng/mL, respectively. The LOQs were determined in 0.2 ng/mL for THC, 0.4 ng/mL for THC−OH, 0.8 ng/mL for CBD and CBG, 1.6 ng/mL for THCA and 3 ng/mL for CBDA. The method was applied to the analysis of 15 serum samples from DUID cases.To the best of our knowledge, the present work is the first one describing an application of APGC source in the field of forensic toxicology.
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