Table 1 Detailed information for six volatile alkylpyrazines and internal standard
Compound | Abbreviation | CAS | Formula | B.P. (°C) | M.W. | GC retention time (min) | |
|---|---|---|---|---|---|---|---|
DB-5MS | DW-WAX | ||||||
2-Methylpyrazine | MP | 109-08-0 | C5H6N2 | 135 | 94 | 4.4 | 6.5 |
2,5-Dimethylpyrazine | DMP | 123-32-0 | C6H8N2 | 155 | 108 | 5.4 | 6.9 |
2-Ethylpyrazine | EP | 13925-00-3 | C6H8N2 | 152~153 | 108 | 5.4 | 7.0 |
2-Ethyl-3,5-dimethylpyrazine | EDMP | 27043-05-6 | C8H12N2O | 180~181 | 136 | 6.9 | 7.8 |
2-Isopropyl-3-methoxypyrazine | IPMP | 25773-40-4 | C8H12N2O | 120~125 | 152 | 7.0 | 7.7 |
2-Ethoxy-3-ethylpyrazine | EEP | 35243-43-7 | C8H12N2O | 195~197 | 152 | 7.2 | 7.9 |
n-Nitrosodi-n-propylamine-d14 | NDPA-d14 | 93951-96-3 | C6D14N2O | 206 | 144 | 7.0 | 8.3 |