Popis: |
Corn oil was heated with alanine, cysteine, glycine, phenylalanine, ammonia, methylamine, or ethylamine at 180°C for 4 h. The volatiles formed in the headspace were collected using a simultaneous purging and solvent extraction apparatus and analyzed by gas chromatography and gas chromatography/mass spectrometry. Fourteen mono- and di-alkylpyrroles were identified in the headspace extracts of the corn oil/amino acid mixtures and the corn oil/amine mixtures. It is proposed that α,β-unsaturated fatty aldehydes reacted with the alkylamine produced from the corresponding pyrolyzed amino acid to form 1-alkylpyrroles. |