固相微萃取—气相色谱—质谱联用分析蓼实挥发性成分

察了萃取样品温度、萃取纤维吸附时间等因素对于固相微萃取蓼实挥发性成分的影响，确定较佳的实验条件为：萃取样品温度60℃，萃取纤维吸附时间60 min，脱附温度250℃，脱附时间5 min。用气相色谱—质谱联用技术测定上述条件所得蓼实挥发性化学成分，并鉴定出其中43种，占总峰面积的76.73%。其中含量较高的物质有：罗汉柏烯 (6.99%),丁香烯 (5.59%)，2,5,5,8 a-四甲基-6,7,8,8a 四氢-5H-萘-1-酮(5.52%),α-丁香烯(4.29%)，1,2,4a,5,6,8a-六氢-4,7-二甲基-1-异丙基萘(4.04%)，环氧石竹烯(3.60%),α-香附酮(3.54%)，4,5,5a,6,6a,6b-6氢-4,4,6b-三甲基-2-乙烯基-2H-环丙香豆酮(3.54%)，香叶基丙酮(3.48%)。

Analysis of the Volatile Constituents from Seeds of Polygonum orientale by Gas Chromatography-Mass Spectrometry Coupled with Solid-phase Microextraction

Effect of sample temperature and adsorption time on the SPME(solid phase microextraction) treatment of seeds of Polygonum orientale L. were investigated. The optimal extraction conditions were absorption at 60℃ for 60 min and desorption at 250℃ for 5 min. Samples of seeds of P. orientale L. were analyzed by GC-MS coupled with SPME. Through comparison with mass spectra database，forty-tree components were identified，covering 76.73% of the total peak areas in the GC-MS total ion current chromatography. The characteristic components were Thujopsene(6.99%),Caryophyllene5.59%),2,5,5,8a-Tetramethyl-6,7,8,8a-tetrahydro-5H-naphthalen-1-one(5.52%),α-Caryophyllene(4.29%),1,2,4a,5,6,8a-hexahydro-4,7-dimethyl-1-(1-methylethyl)-Naphthalene(4.04%),Caryophylleneoxide(3.60%),α-Cyperone(3.54%),4,5,5a,6,6a,6b-hexahydro-4,4,6b-trimethyl-2-(1 methylethenyl)-2H-Cyclopropa-benzofura n(3.54%),Geranylacetone(3.48%).