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. Author manuscript; available in PMC: 2023 Feb 4.
Published in final edited form as: Drug Alcohol Depend. 2022 Jun 3;237:109522. doi: 10.1016/j.drugalcdep.2022.109522

Table 1.

Selective reaction monitoring (SRM) transitions for Δ9-THC and Δ9-THC-d9 (internal standard).

Analyte Precursor Ion (m/z) Product Ions (m/z)
Δ9-tetrahydrocannabinol (Δ9-THC) 315.2 193.1*
259.2
123.1
Δ9-tetrahydrocannabinol -d9 (Δ9-THC-d9) 324.2 202.1*
268.2
122.9
*

quantifier ion