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. 2019 Mar 29;9:5325. doi: 10.1038/s41598-019-41824-8

Table 5.

Aroma compounds produced in maltose (Mal)–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)
Mal + Lys Mal + Ser Mal + Thr Mal + 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 0.0024 ± 0.0002 0.0046 ± 0.0005 0.0053 ± 0.0002 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 0.0064 ± 0.0005 0.0063 ± 0.0002 N.D
2-Ethyl-3,6-dimethylpyrazine 28.400 1474 1474 o N.D N.D 0.0047 ± 0.0000 N.D
2-Ethyl-3,5-dimethylpyrazine 28.829 1490 1491 o N.D N.D N.D N.D
2-Acetylthiazole 33.705 1686 1686 o N.D N.D N.D N.D
Benzaldehyde 30.642 1562 1562 o 0.0041 ± 0.0004 0.0051 ± 0.0003 0.0053 ± 0.0004 0.0110 ± 0.0006