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SRM LC/MS Analysis of Dried Plasma Spots Collected as Finger Pricks from “Users” of Various Cannabis Products. Sample #5 Is the Only One Who Had Recently Smoked Marijuana Prior to Blood Collection, and Thus, the Sample Contained the Predominant Metabolites of THC Which Include THC-COOH and THC-OH
| Sample no. | THC (ng/mL) | THC-COOH (ng/mL) | THC-OH (ng/mL) |
|---|---|---|---|
| 1 | 157.7 | ND | ND |
| 2 | 189.5 | ND | ND |
| 3 | 53.9 | ND | ND |
| 4 | 46.6 | ND | ND |
| 5 | 527.6 | 180.8 | 97.3 |
| 6 | 284.7 | ND | ND |
ND not determined
