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Extraction efficiency, process efficiency, matrix effect and coefficient of variation for each analyte at 10 ng/L.
| Compound | Extraction efficiency (%) | Process efficiency (%) | Matrix effect (%) |
|---|---|---|---|
| Morphine | 79.0 | 73.3 | −7.6 |
| Oxymorphone | 84.0 | 63.1 | −24.5 |
| Hydromorphone | 75.0 | 48.8 | −35.1 |
| Oxycodone | 82.0 | 63.5 | −23.1 |
| Hydrocodone | 84.0 | 72.6 | −13.8 |
| THC | 25.4 | 22.7 | −10.6 |
| THCCOOH | 66.5 | 62.7 | −5.8 |
| THCCOOH-glucuronide | 53.1 | 45.3 | −14.7 |
