Effect of roasting time and temperature on the generation of nonvolatile (polyhydroxyalkyl)pyrazine compounds in peanuts, as determined by high-performance liquid chromatography
1996
Magaletta, R.L. | Ho, C.T.
A high-performance liquid chromatographic (HPLC) method was used for the determination of (polyhydroxyalkyl)pyrazine (PHAP) compounds in peanuts roasted to different levels as part of a 3 X 3 time/temperature study. The content of volatile alkylpyrazine compounds generated at each point was determined by headspace gas chromatography-mass spectrometry (GC-MS) and compared to the PHAP content. In general, results showed that the levels of both PHAP and alkylpyrazine compounds increased with both time and temperature, reaching a maximum at the longest roast time and highest temperature. Formation rates for both types of compounds showed a strong dependence on temperature, giving linear Arrhenius plots with similar slopes. There was no indication that the PHAP compounds formed during roasting decomposed to form alkylpyrazines.
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