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Table 1 Monitored transitions (m/z) for Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD) standards in methanol, optimized using the Agilent MassHunter Optimization software for liquid chromatography tandem mass spectrometry (LC–MS/MS). Retention times were established in the chromatography separation

From: Study of Δ9-tetrahydrocannabinol (THC) and cannabidiol (CBD) extraction FROM dried oral fluid spots (DOFS) and LC–MS/MS detection

Drug Associated Internal Standard (ISTD) m/z Q1 m/z Q3 Retention Time (Minutes)
CBD CBD-d3 315.2 315.2 → 123
315.2 → 193
8.22
THC THC-d3 315.2 315.2 → 123
315.2 → 193
9.13