采用HS-SPME-GC-MS分析棕榈油热处理过程中挥发性成分变化

摘要

采用顶空固相微萃取与气相色谱质谱联用技术(HS-SPME-GC-MS)对棕榈油(24℃)热处理过程(180℃)中挥发性成分变化进行分析.结果表明:热处理前后的棕榈油中共鉴定出63种挥发性化合物,包括醛类、醇类、酸类、酮类、烃类和杂环类;棕榈油中挥发性成分种类随加热时间的延长呈先增多后减少趋势;经热处理后,棕榈油中挥发性成分种类以醛类和烃类为主,且醛类物质含量最高,加热12 h后达80.413％;此外,1-辛烯-3-醇、己酸、2-十五烷酮和2-戊基呋喃的检出表明棕榈油中亚油酸发生了氧化分解,其变化趋势表明棕榈油随加热时间延长氧化劣变程度加深,油脂品质劣变加重.%The volatile components of palm oil (24 ℃) were analyzed by headspace solid-phase micro extraction and gas chromatography-mass spectrometry (HS-SPME-GC-MS) in the heat treatment process of palm oil (180 ℃).The results showed that 63 kinds of volatile compounds were identified,including aldehydes,alcohols,acids,ketones,hydrocarbons and heterocyclics.The volatile components of palm oil increased firstly and then decreased with heating time prolonging.The volatile components of palm oil were mainly aldehydes and hydrocarbons,and the content of aldehydes was the highest,reaching 80.413％ after heating for 12 h.In addition,the detection of 1-octen-3-ol,caproic acid,2-penta-decanone and 2-pentylfuran revealed that the linoleic acid in palm oil was oxidized.Its change trend showed that the degree of oxidative deterioration of plam oil deepened and the oil quality gradually deteriorated with heating time prolonging.