Fig. 1

Chromatogram of cannabinoids in a calibrator prepared in a blank brownie. The retention times for cannabinoids shown in the chromatogram are as follows: cannabidivarin (CBDV)-8.827 min, cannabidiol (CBD)—9.527 min, cannabichromene (CBC)—9.838 min, ∆-9-tetrahydrocannabinol (THC)—9.985 min, cannabigerol (CBG)—10.209 min, cannabinol (CBN)—10.325 min, cannabidiolic acid (CBDA)—10.615 min, and ∆-9-tetrahydrocannabinolic acid (THCA)-11.160 min