杭白菊和杭黄菊挥发油的GC-MS分析

通过气相色谱-质谱联用仪检测杭白菊和杭黄菊的挥发油化学成分,分别从杭白菊和杭黄菊挥发油中分离鉴定出59种和65种化合物,其主要成分为单萜、倍半萜及其含氧衍生物.     

GC-MS and GC-MS-MS analysis of a complex essential oil

Summary The alcoholic portion of avetiver oil (Bourbon), the gas chromatogram of which shows more than 100 components, was analyzed by combined GC-MS with different ionization methods. This enabled us to identify major components. The specificity of the method was improved by using combined gas chromatography-tandem mass spectrometry in the collision-activated-dissociation mode.     

双花千里光花精油的GC-MS分析

采用气相色谱-质谱联用技术对西藏药用植物双花千里光的花精油进行化学成分分析,共分离出100余个峰,鉴定出其中73个化合物,其含量占精油总量的89％以上。该花精油的成分主要为单萜、倍半萜和脂肪酸及其酯,其中大于2％的成分共有12个,占精油总量的约70％。     

GC-MS analysis of Ziziphora clinopodioides essential oil from North Xinjiang, China

The essential oils of Ziziphora clinopodioide Lam. from four different production areas (Banfang ditch; Altay mountains; Tuoli; Terks) were investigated. The oils were extracted by hydro-distillation and analyzed by gas chromatography-mass spectrometry (GC-MS). Seventeen constituents were identified in the essential oil from Banfang ditch, 20 in that from the Altay mountains, 12 in the Tuoli essential oil, and 9 in the Terks sample. The major components of the oils were pulegone (67.6%, 32.5%, 86.4%, and 82.1%) and p-menthanone (14.8%, 43.7%, 3.2%, and 8.2% from the Banfang ditch, Tuoli, Altay mountains, and Terks samples, respectively).     

超临界萃取川芎精油的GC-MS分析

不同压力和温度条件下超临界萃取所得川芎精油的收率不同,通过气相色谱-质谱联用对精油的挥发性成分进行分析,结果表明不同条件下超临界萃取所得川芎精油的主要挥发性成分相似,但其质量分数有一些差别.     

水母雪莲花挥发油的GC-MS分析

采用气相色谱-质谱(GC-MS)联用技术对西藏产水母雪莲花的挥发油化学成分进行分析,共分离鉴定出83种化合物,占挥发油总量的70%以上.其中主要成分有β-芹子烯(6.72%)、斯杷土烯醇(4.74%)、红没药醇(4.10%)和金合欢醇(3.32%)等.     

紫花冷蒿挥发油成分的研究

采用水蒸气蒸馏法提取,运用气相色谱-质谱联用法对香叶蒿挥发油化学成分进行了分析,用气相色谱面积归一化法测定了各成分的质量分数。结果鉴定出72个化合物,主要成分为樟脑(33.136%),桉树脑(23.419%),6-甲基-2-乙烯基-1,3-庚二烯醛(8.414%),孟烯醇(3.819%),桥环萜烯酮(3.276%),莰烯(2.454%),1R-α-蒎烯(1.917%),去甲基丁香酚(1.550%),α-松油醇(1.449%),冰片(1.674%),β-香叶烯(1.165%),百里香酚(0.329%)等。研究表明紫花冷蒿挥发油主要为单萜及其氧化衍生物。其挥发油成分的研究为挖掘其药用及食品香料工业的应用价值提供了科学依据。     

大叶冬青挥发油化学成分的GC-MS分析

采用气相色谱-质谱联用法对大叶冬青挥发油的化学成分进行研究,鉴定出大叶冬青挥发油中含醇、酮、酰胺及含氧萜类等71个化学成分,运用峰面积归一化法测定各化学成分的相对百分含量,已鉴定的化学成分占挥发油总量的96.16%.     

扁桃油中脂肪酸组成的GC-MS法分析

以正己烷为提取剂,采用超声法提取油脂,经KOH-甲醇甲酯化处理后,以气相色谱-质谱(GC-MS)联用技术鉴定出陕西蒲城3个品种扁桃油中的脂肪酸主要组成为:油酸、亚油酸、9-十六碳烯酸、硬脂酸、棕榈酸,其中不饱和脂肪酸总量占91.4%以上,主要成分油酸占73.3%以上。     

GC-FTIR and GC-MS in odour analysis of essential oils

The analysis of odour components in East Indian Sandalwood Oil (Santalum album L.) and in Patchouli Oil (Pogostemon cablin Benth.) based on GC-, GC-FTIR- and GC-MS-data resulted in the identification of-santalene,-santalal,-santalal, epi--santalal,-santalol,-santalol, (E)--santalol,-bergamotol and spirosantalol in Sandalwood Oil and of (–)-patchoulol,-guaiene,-patchoulene, seychellene,-bulnesene, norpatchoulenol and pogostol in Patchouli Oil as the most intense aroma compounds of these oils.     

Chemical constituents of the essential oil from aerial parts and fruit of Anisosciadium orientale

The essential oils from aerial parts and fruits of Anisosciadium orientale DC. growing wild in Iran were obtained by hydrodistillation and analyzed by GC and GC/MS. Seventy-one compounds were identified in the fruit oil and fifteen in the oil from the aerial parts. The main oil components of the fruits and aerial parts were myristicin (33.5%-33.7%), alpha-terpinolene (22%-25.8%) and limonene (19.5%-19.7%). Some compounds, such as geranyl butyrate and germacrene-D, were only detected in the fruit oil.     

Antifungal activity of the essential oil of Illicium verum fruit and its main component trans-anethole

In order to identify natural products for plant disease control, the essential oil of star anise (Illicium verum Hook. f.) fruit was investigated for its antifungal activity on plant pathogenic fungi. The fruit essential oil obtained by hydro-distillation was analyzed for its chemical composition by gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). trans-Anethole (89.5%), 2-(1-cyclopentenyl)-furan (0.9%) and cis-anethole (0.7%) were found to be the main components among 22 identified compounds, which accounted for 94.6% of the total oil. The antifungal activity of the oil and its main component trans-anethole against plant pathogenic fungi were determined. Both the essential oil and trans-anethole exhibited strong inhibitory effect against all test fungi indicating that most of the observed antifungal properties was due to the presence of trans-anethole in the oil, which could be developed as natural fungicides for plant disease control in fruit and vegetable preservation.     

Chemical composition of the essential oil from Corsican Mentha aquatica--combined analysis by GC(RI), GC-MS and 13C NMR spectroscopy

The essential oil (EO) of M. aquatica L. growing wild in Corsica was isolated by dry vapor distillation and submitted to combined analysis by column chromatography over silica gel, GC(RI), GC-MS and 13C NMR spectroscopy. The composition was dominated byoxygenated monoterpenes and characterized by the occurrence of menthofuran (50.7%) as the major component. In parallel, seven laboratory-distilled oil samples isolated from individual plants collected in Corsica were analyzed by GC(RI) and 13C NMR spectroscopy. Onlyquantitative differences were observed between the samples. Beside the usual terpenes, various p-menthane lactones (mintlactone, isomintlactone, hydroxymintlactone, menthofurolactone and epimenthofurolactone) have been identified in all the oil samples.