Table 6.
Aroma compounds produced in lactose (Lac)–amino acid (lysine (Lys), serine (Ser), threonine (Thr), and cysteine (Cys)) Maillard reaction model systems.
| Compounds | Retention time | K.I | K.I (Ref) | Co-injection | PAR (peak area ratio) | |||
|---|---|---|---|---|---|---|---|---|
| Lac + Lys | Lac + Ser | Lac + Thr | Lac + Cys | |||||
| 2,3-Dimethyl pyrazine | 25.609 | 1372 | 1375 | o | N.D | N.D | N.D | N.D |
| 2,5-Dimethyl pyrazine | 24.878 | 1363 | 1350 | o | N.D | N.D | 0.0070 ± 0.0004 | N.D |
| 2,6-Dimethyl pyrazine | 25.041 | 1356 | 1356 | o | N.D | N.D | N.D | N.D |
| 2,3,5-Trimethyl pyrazine | 27.270 | 1434 | 1430 | o | N.D | N.D | 0.4961 ± 0.0310 | N.D |
| 2-Ethyl-3,6-dimethylpyrazine | 28.400 | 1474 | 1474 | o | N.D | N.D | 0.0086 ± 0.0004 | N.D |
| 2-Ethyl-3,5-dimethylpyrazine | 28.829 | 1490 | 1491 | o | N.D | N.D | 0.0064 ± 0.0005 | N.D |
| 2-Acetylthiazole | 33.705 | 1686 | 1686 | o | N.D | N.D | N.D | N.D |
| Benzaldehyde | 30.642 | 1562 | 1562 | o | 0.0053 ± 0.0004 | 0.0063 ± 0.0002 | 0.0043 ± 0.0004 | 0.0043 ± 0.0004 |