Table 1.
MS/MS data acquisition for PAs, PANOs and IS and their respective retention times.
| Analytes | RT (min) | Precursor ion [M + H]+ (m/z) | CE (%) | Product ions MS2 (m/z) |
|---|---|---|---|---|
| Indicine N-oxide (Indi NO) | 5.6 | 316 | 33 | 298, 272, 226, 172, 138 |
| Jacobine (Jaco) | 6.0 | 352 | 25 | 308, 280, 262, 155, 120 |
| Lycopsamine (Lyco) | 6.3 | 300 | 28 | 156, 138, 120, 94 |
| Intermedine (Inter) | 6.4 | 300 | 28 | 138, 120, 94 |
| Retrorsine N-oxide (Retro NO) | 7.5 | 368 | 28 | 340, 338, 246, 220, 118 |
| Jacobine N-oxide (Jaco NO) | 9.0 | 368 | 30 | 324, 296 |
| Lycopsamine N-oxide (Lyco NO) | 9.0 | 316 | 33 | 272, 226, 172, 138, 94 |
| Retrosine (Retro) | 11.5 | 352 | 25 | 324, 276, 138, 120 |
| Caffeine (IS) | 12.2 | 195 | 35 | 138 |
| Seneciphylline (Senep) | 12.5 | 334 | 25 | 306, 280, 138, 120 |
| Heliotrine (Helio) | 12.7 | 314 | 23 | 156, 138, 120, 96 |
| Seneciphylline N-oxide (Senep NO) | 13.6 | 350 | 30 | 332, 322, 208, 246, 118 |
| Heliotrine N-oxide (Helio NO) | 14.2 | 330 | 30 | 298, 172 |
| Senecionine (Senec) | 15.1 | 336 | 25 | 308, 290, 138, 120 |
| Senecionine N-oxide (Senec NO) | 15.4 | 352 | 25 | 324, 246, 220, 118 |
| Echimidine N-oxide (Echi NO) | 16.5 | 414 | 30 | 396, 352, 254 |
| Echimidine (Echi) | 16.6 | 398 | 40 | 380, 336, 220, 120 |
| Senkirkine (Senk) | 16.9 | 366 | 25 | 348, 168, 150, 122 |
RT: retention time; CE: collision energy; IS: internal standard; _ quantifier ion.