Table 4.
CBN (μg/l) concentrations in expectorated oral fluid from 10 participants before and after smoking a single 6.8% THC cigarette.
| Time (h) | −0.5 | 0.25 | 0.5 | 1 | 2 | 3 | 4 | 6 | 22 |
|---|---|---|---|---|---|---|---|---|---|
| A | <LOQ | <LOQ* | NC | 8.1 | 1.4 | <LOQ | <LOQ | <LOQ | <LOQ |
| B | <LOQ | NC | NC | NC | 22.8 | 6.9 | 6.7 | 3.0 | <LOQ |
| C | <LOQ | 303 | 73.5 | <LOQ* | 22.2 | 1.8 | 2.8 | 1.7 | <LOQ |
| D | <LOQ | 230 | 14.6 | 20.5 | <LOQ | <LOQ | <LOQ | <LOQ | <LOQ |
| E | <LOQ | 414 | 40.5 | 19.2 | <LOQ | 4.3 | 1.1 | <LOQ | DC |
| F | <LOQ | 142 | 85.0 | 15.6 | 4.8 | 2.9 | <LOQ | 1.0 | DC |
| G | <LOQ | 151 | NC | 39.8 | 2.3 | <LOQ | <LOQ | <LOQ | <LOQ |
| H | <LOQ | 1964 | NC | 115 | 23.7 | 21.6 | 2.8 | 1.2 | <LOQ |
| I | <LOQ | 12.7 | 5.8 | 2.7 | <LOQ | <LOQ | <LOQ | <LOQ | DC |
| J | <LOQ | 185 | 85.5 | 19.3 | 23.3 | 7.9 | 2.4 | 2.8 | DC |
| Mediana | - | 230 | 40.5 | 19.2 | 13.5 | 4.3 | 2.8 | 1.5 | - |
NC- not collected due to dry mouth; DC -discharged at 6 h from the unit;
<LOQ – below limit of quantification: CBN – 1 μg/l;
<LOQ* – below limit of quantification in low volume specimens for CBN (50 μg/l), due to a required 50-fold dilution.
a
Median – participant J excluded due to blood in oral fluid