艾叶挥发油及其热裂解物成分分析

Analysis on Volatile Oil of Artemisia argyi and Its Thermochemical Pyrolysis Components

采用水蒸气蒸馏法,对干艾叶中挥发油进行提取,测得干艾叶中含挥发油的质量分数为2.6%,并用气相色谱-质谱联用技术进行分析鉴定,鉴定出48种化学成分,应用峰面积归一法确定了各成分的相对质量分数。水蒸气蒸馏法提取的艾叶挥发油主要含桉树脑(21.90%)、2-莰醇(6.04%)、樟脑(5.97%)、2-蒎烯(5.52%)、β-石竹烯(4.80%)等。采用热裂解-气相色谱-质谱联用方法对干艾叶挥发油在900℃的条件下进行热裂解,并分析其热裂解物的化学组成,鉴定出44种化学成分,主要包括(+)-γ-古芸烯(9.58%)、β-石竹烯(6.91%)、α-松油醇(6.89%)、马鞭烯醇(6.61%)、4-萜品醇(6.35%)等。

The volatile oil of dry Artemisia argyi was obtained by steam distillation with yield of 2.6%. Forty - eight components were identified by GC - MS, their relative contents were determined with area normalization method. The main components were eucalyptol （21.90%）, 2 - camphanol （6.04%）, camphor （5.97%）, 2 - pinene （5.52%）, β - caryophyllene （4.80%）. Then, the oil was pyrolysed and detected by online Pyrolysis - Chromatography - Mass Spectrometry under 900 ℃, 44 pyrolytic components were detected, including （＋） - γ - gurjunene（9.58%）, β - caryophyllene（6.91%）, α - terpineol（6.89%）, verbenol（6.61%） and 4 - terpineol（6.35%）.