Food Chemistry

372 5 Aroma Compounds

Table 5.24.Pyrazines in food

Structure Substituent Aroma Odor threshold value
quality (μg/l; water)

Trimethyl- Earthy 90

2-Ethyl-3,5-dimethyl- Earthy, roasted 0. 04

2-Ethenyl-3,5-dimethyl- Earthy, roasted 0. 1

2-Ethyl-3,6-dimethyl- Earthy, roasted 9

2,3-Diethyl-5-methyl- Earthy, roasted 0. 09

2-Ethenyl-3-ethyl-5-methyl- Earthy, roasted 0. 1

Acetyl- Roasted corn 62

2-Isopropyl-3-methoxy- Potatoes 0. 002

2-sec-Butyl-3-methoxy- Earthy 0. 001

2-Isobutyl-3-methoxy- Hot paprika (red pepper) 0. 002