Effect of Pyrolytic Temperature of beta - Caro-tene on the Formation of Aromatic Substances

摘要

Effects of different pyrolytic temperatures on the formation of aromatic substances were investigated by pyrolysis chromatography-mass chromatography when β-carotene was py-rolysed at high temperature under nitrogen protection. It showed that pyrolytic temperature had great influence on the formation of aromatic substances. The content of aromatic substances produced at different pyrolytic temperatures was different greatly. β-Ionone, dihydro-actinidiolide, megastigmatriene, isophorone, safranal, dimethylfuran were the mam aromatic substances when β-carotene was pyrolysed at relatively lower temperature and the contents of those aromatic substances except dihydroactinidiolide were reduced with the increase of pyrolytic temperature. However, the contents of those aromatic substances increased when the pyrolytic temperature reached 500℃. Further increasing the pyrolytic temperature, the contents of all aromatic substances were reduced quickly to zero.