Fig. 2

Representative chromatograms. Representative chromatograms of standard cannabinoid concentrations (100 ng/mL, each) in a positive and b negative ionization mode. Retention times for each cannabinoid are as follows: Cannabidivarin (CBDV)—1.9 min, Cannabigerol (CBG)—2.1 min, Cannabidiol (CBD)—2.2 min, Tetrahydrocannabivarin (THCV)—2.5 min, Cannabinol (CBN)—2.8 min, Δ-9-tetrahydrocannabinol (Δ-9-THC)—3.2 min, Δ-8-tetrahydrocannabinol (Δ-8-THC)—3.3 min, Cannabicyclol (CBL)—3.4 min, Cannabichromene (CBC)—3.6 min, Cannabidiolic acid (CBDA)—2.3 min, Cannabigerolic acid (CBGA)—2.5 min, and Tetrahydrocannabinolic acid (THCA)—4.3 min