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Retention times and [M+H]+ m/z (Δmass =5 ppm)of the analytes under investigation.
| Analyte | [M+H]+ m/z | Acquisition Window (min) | Retention Time (min) |
|---|---|---|---|
| Etazene | 352.2385 | 2.5–4.5 | 3.91 |
| Flunitazene | 371.1871 | 3.1–5.1 | 4.69 |
| Isotonitazene | 411.2386 | 4.1–6.1 | 5.06 |
| Protonitazene | 5.18 | ||
| Fentanyl-d5 | 342.2588 | 4.83 |
