烹调油烟冷凝物中某些醛类化合物的 GC/MS 分析及生成机制的研究

Gas chromatography/mass spectrometry analysis of some aldehydes in cooking oil smoke condensate and their formation mechanism

利用 GC/ MS分析了烹调油烟冷凝物中醛的组成及其相对含量 .采自餐馆的样品中可能含有壬醛、2 -庚烯醛、2 -癸烯醛、2 ,4-癸二烯醛、9,17-十八二烯醛等 5种醛 ,占总峰面积的 12 .65 % ;采自居民家中的样品中可能含有己醛、庚醛、辛醛、壬醛、2 -辛烯醛、2 -十一烯醛、9,17-十八二烯醛、2 -辛基环丙基辛醛等 13种醛 ,占总峰面积的 15 .2 0 % .

The components of aldehydes and their relative quantities in cooking oil smoke condensate were analyzed by gas chromatography/mass spectrometry. Five aldehydes, i. e. nonanal, 2 heptenal, 2 decenal, 2,4 decedienal, 9,17 octadecadienal, were found in the sample collected from the restaurant ,and the peak area of aldehydes was 12.65 percent of total peak area. Meanwhile the sample collected from resident house was determined and thirteen aldehydes including hexanal, heptanal, octanal, nonanal, 2 octenal, 2 undecenal, 9,17 octadecadienal, 2 octyl cyclopropaneoctanal were identified, and the peak area of aldehydes was 15.20 percent of total peak area. The formation mechanism of the aldehydes was also discussed.