大葱挥发油含量与化学成分的分析

采用水蒸气蒸馏法提取莱芜鸡腿葱中的挥发油 ,测知其含量为 0 0 1 % ;并用毛细管气相色谱 /质谱法定性鉴别了挥发油中的 2 5种化学成分。其中含硫有机硫化合物为 2 0种 ;主要成分有 :丙基甲基硫代硫磺酸酯 ,甲基烯丙基硫代硫磺酸酯 ,甲基丙烯基三硫醚 ,烯丙基硫醇 ,甲丙基二硫醚 ,反式甲基烯丙基二硫醚 ,二甲基三硫醚 ,二丙基二硫醚 ,反式烯丙基丙基二硫醚 ,二甲基四硫醚 ,二丙基三硫醚 ,反式烯丙基丙基三硫醚 ,顺式烯丙基丙基三硫醚 ,甲硫醇 ,丙硫醇 ,二巯基甲烷 ,2 ,5 二甲基噻吩等含硫化合物 ,还鉴定出不饱和脂肪醛 1种 (3 ,7 二甲基 2 ,6 二辛烯醛 ) ,脂肪酮 1种 (十一酮 2 ) ,萜烯类化合物 2种 (2 甲基 庚稀 2和顺式 2 ,6 二甲基 2 ,6 辛二烯 ) ,挥发性无机化合物 1种 (SO2 )。

Study on the Content and Chemical Constituents of Volatile Oil in Welsh Onions (Allium fistulosum L var.giganteam Makino.)

T The volatile oil was obtained from the distillation of welsh onions (Allium fistulosum L var. giganteam Makino.).The content of volatile oil was 0.01%, with 25 of chemical constituents being identified by capillary gas chromatography-mass spectrometry. The main components are sulfur-containing compounds such as propyl methanethiosulfonate, 2-propyl trisulfide, allyl mercaptan, dithiomethane, trans-3,5-deithy-1,2,4-trithiolane, methyl methane thiosulfinate, 2,5-dimethyl-thiophene,methyl propyl disulfide, trans-propenyl methyl disulfide, dimethyl trisulfide, dipropyl disulfide, transpropenyl propyl disulfide, 1-propenyl methanethiosulfonate, methyl 1-propenethiosulfonate,dimethyl tetrasulfide, methyl propanethiosulfonate, trans-propenyl propyl trisulfide, cis-propenyl propyl trisulfide. Other kinds of chemicals identified included terpenes, ketone, and aldehyde.