超临界状态下松脂与甲醇反应产物的GC-MS分析

Characterization of Reaction Products from Pine Gum with Methanol under Supercritical Conditions by GC-MS

摘要: 采用气相色谱-质谱联用技术(GC-MS)分别对在超临界状态下松脂与甲醇反应产物进行分析,共分离出49个峰,鉴定出45种化合物,反应产物主要为甲酯类、烯烃类化合物,还有较少量的芳香烃类、烷烃类和醇酮类等化合物。甲酯类的主要成分为脱氢枞酸甲酯、 1,2,3,4,4a,9,10,10a-八氢-1,4a-二甲基-1-菲羧酸甲酯及二氢异海松酸甲酯,GC含量分别为 24.48 %、 5.35 %、 5.15 %;烯烃类主要成分为对-薄荷烯、 1-甲基-3-(2-甲基-1-丙烯基)-环己烯、 (+)-环异洒剔烯、长叶烯,GC含量分别为 14.99 %、 7.88 %、 4.15 %、 6.71 %。

Abstract: The reaction products from pine gum with methanol under supercritical conditions were analyzed by gas chromatography-mass spectrometry (GC-MS), using DB-5 MS flexible quartz capillary column. Forty-nine peaks were separated and forty-five compounds were identified. The results showed that reaction products mainly included methyl esters and alkenes, slightly aromatic hydrocations, alkanes and alcohols. Methyl esters included methyl dehydroabietic acid(24.48 %),1,2,3,4,4a,9,10,10a-octaahydro-1,4-dimethyl-1-methyle phenanthrenecarboxylic acid(5.35 %), and methyl isopimarenoic acid(5.15 %), while alkene included p-mentha(14.99 %), 1-methyl-3-(2-methyl-1-propenyl)-cyclopentane(7.88 %), (+)-cycloisosativene (4.15%), and longipinene(6.71%).