顶空固相微萃取-气相色谱质谱联用分析汉麻叶挥发性成分

采用顶空固相微萃取法结合气相色谱-质谱联用对汉麻叶的挥发性成分进行分析,考察3种不同萃取纤维（DVB/CAR/PDMS,CAR/PDMS,PDMS/DVB）对分析结果的影响,结果表明较佳萃取纤维为CAR/PDMS.从汉麻叶中检出59种挥发性成分,占挥发油总组分的93.18%,其中醛类3种（0.71%）、醇类1种（0.06%）、烃类37种（57.23%）、杂环化合物类3种（0.19%）、萜烯类12种（34.49%）、其他3种（0.50%）.在鉴定出的成分中含量较多的是[1R-（1R＊,4Z,9S＊）]-4,11,11-三甲基-8-亚甲基-二环[7.2.0]4-十一烯（18.81%）、（1α,3α,5α）-1,5-二甲基-3-甲基-2-亚甲基环己烷（18.18%）、α-石竹烯（11.52%）、异柠檬烯（6.78%）等.     

气相色谱质谱联用初步分析机动车尾气中的有机成分

应用色谱-质谱联用（GC-MS）技术,对多种机动车尾气组分做了相应的测试分析和研究.根据样品分析结果发现,主要成分包括烯烃、烷烃、芳香烃类物质,并且对这些物质的产生原因及消除办法加以讨论.     

利用气相色谱-质谱检测进口原棉农药残留

采用丙酮-正己烷超声波水浴法提取原棉中的农药残留物,参照GB/T 18412.1—2006建立了气相色谱-质谱联用技术同时检测原棉中久效磷、乐果、马拉硫磷、α-硫丹、P,P′-滴滴依、β-硫丹、氰戊菊酯、溴氰菊酯8种杀虫剂的方法。8种杀虫剂在0.2~5μg/mL,样品浓度与峰面积有良好的线性关系。该方法操作简便、重现性好、回收率高,可用于进口原棉多种农药残留量的测定。     

互叶白千层挥发性成分的提取和分析

采用水蒸气蒸馏法从互叶白千层叶及嫩枝中提取挥发油中的油相成分,用乙醚作为溶剂从蒸馏残液中萃取挥发油的水溶性物质,利用气相色谱-质谱（GC-MS）联用分析二者的化学成分并进行比较。互叶白千层挥发性成分的油相部分经鉴定确认了27种成分,占油相部分总量的98.60%,主要成分为松油烯-4-醇（52.15%）、γ-松油烯（19.60%）、α-松油烯（5.86%）、α-松油醇（3.93%）、对伞花烃（3.52%）、1,8-桉叶油素（2.67%）;水溶性部分经鉴定确认了61种成分,占水溶性部分总量的79.15%,主要成分为松油烯-4-醇（27.42%）、α-松油醇（6.55%）、香芹酚（5.00%）、1,8-桉叶油素（4.10%）。     

枫香与缺萼枫香果实挥发性成分的GC - MS分析

采用GC - MS法对枫香与缺萼枫香果实挥发性成分进行分析,在枫香果实挥发油中共检出35个成分,鉴定了29个成分,主要成分为β-蒎烯、1S-α-蒎烯和石竹烯,含量分别为16.69％、15.22％和12.54％;在缺萼枫香果实挥发油中共检出47个成分,鉴定了33个化合物,主要成分是β-蒎烯、1R-α-蒎烯和石竹烯,含量分别为22.10％、21.93％和11.41％,研究结果可为扩大枫香药用资源的应用及药材鉴定提供科学依据.     

运用气相色谱-质谱（GC-MS）联用法对牛至挥发油化学成分的分析

牛至挥发油因具有镇痛、抗菌、抗病毒等作用，在临床上用于预防流感、治疗黄疽等疾病,采用超临界CO2技术萃取牛至挥发油，并用GC-MS分析其化学组成，共确定46组分，占总含量的90．347％，其中包括酸、酯、烯、酚、炔、醇等多种化合物，含量最多有麝香草酚（14．109％）和1-甲基-2-异丙基-苯（14．610％）．     

气相色谱-质谱联用技术测定溴系和氯系阻燃剂的研究进展

阻燃剂所引起的环境问题日渐显现。气相色谱-质谱联用技术测定溴系阻燃剂的研究主要工作集中在针对不同的检测样品采用不同的样品前处理方法来实现溴系阻燃剂的提取和检测,现用的样品前处理方法主要包括索氏抽提-多层硅胶氧化铝柱分离净化、超声波辅助萃取、微波辅助萃取、顶空固相微萃取等技术。超声辅助萃取、微波萃取等技术也同样用于有机磷酸酯类阻燃剂的前处理。     

榛花挥发性成分分析

采用气流吹扫微注射器萃取(GP-MSE)获得榛花的挥发性成分,利用气相色谱-质谱联用(GC-MS)对所得的榛花的挥发性成分进行分析,并采用归一化法测定其化学成分的相对含量.在榛花的挥发性成分中检测出130个峰,并鉴定出其中的亚油酸甲酯(11.49%)、十六烷酸(10.92%)、9,12-十八碳二烯酸(9.75%)和9,12,15-十八碳三烯酸乙酯(8.80%)、十六烷酸甲酯(7.37%)、正四十烷(6.02%)等70个化合物.     

蒸煮鸡肉的挥发性香气成分

采用同时蒸馏萃取法（即Simultaneous Distillation Extractor,以下简称SED）提取蒸煮鸡肉中的挥发性香气成分,并采用气相色谱质谱联用法（GC－MS）对香气成分进行了鉴定,结果得到化合物44种,共分成9类,其中羟基化合物最多、芳香族次之,羰基化合物对鸡肉特征香气的形式起重要作用,芳香族和呋喃是蒸煮鸡肉的主要香气成分。     

运用气相色谱-质谱(GC-MS)联用法对牛至挥发油化学成分的分析

牛至挥发油因具有镇痛、抗菌、抗病毒等作用,在临床上用于预防流感、治疗黄疸等疾病.采用超临界CO2技术萃取牛至挥发油,并用GC-MS分析其化学组成,共确定46组分,占总含量的90.347%,其中包括酸、酯、烯、酚、炔、醇等多种化合物,含量最多有麝香草酚(14.109%)和1-甲基-2-异丙基-苯(14.610%).     

Analysis of volatile chemical components of Radix Paeoniae Rubra by gas chromatography-mass spectrometry and chemometric resolution

The volatile chemical components of Radix Paeoniae Rubra (RPR) were analyzed by gas chromatography-mass spectrometry with the method of heuristic evolving latent projections and overall volume integration. The results show that 38 volatile chemical components of RPR are determined, accounting for 95.21% of total contents of volatile chemical components of RPR. The main volatile chemical components of RPR are (Z, Z)-9,12-octadecadienoic acid, n-hexadecanoic acid, 2-hydroxy- benzaldehyde, 1-(2-hydroxy-4-methoxyphenyl)-ethanone, 6,6-dimethyl-bicyclo[3.1.1] heptane-2-methanol, 4,7-dimethyl-benzofuran, 4-(1-methylethenyl)-1-cyclohexene-1-carboxaldehyde, and cyclohexadecane.     

Determination of volatile components in cut tobacco with gas chromatography-mass spectrometry and chemometric resolution

Chromatography-mass spectrometry(GC-MS)was used to analyze the volatile components of cut tobacco samples with the help of heuristic evolving latent projections(HELP).After extracting with simultaneous distillation and extraction method,the volatile components in cut tobacco were detected by GC-MS.Then the obtained original two-dimensional data were resolved into pure mass spectra and chromatograms.The qualitative analysis was performed by similarity searches in the national institute of standards and technology(NIST)mass database with the obtained pure mass spectrum of each component and the quantitative results were obtained by calculating the volume of total two-way response.The accuracy of qualitative and quantitative results were greatly improved by using the two-dimensional comprehensive information of chromatograms and mass spectra.107 of 141 separated constituents in the total ion chromatogram of the volatile components were identified and quantified,accounting for about 88.01% of the total content.The result proves that the developed method is powerful for the analysis of complex cut tobacco samples.     

Component analysis of volatile oil from Illicium Verum Hook. f.

Volatile oil was extracted from Illicium Verum Hook. f. by using steam distillation. 41 kinds of compounds were separated and identified by GC/MS, and their relative contents were determined by normalization method. Among 41 identified compounds, there are 14 hydrocarbon components and 22 oxygenated hydrocarbon derivatives, and a small amount of nitrogenous compounds. The main component is anethole, accoun-ting for 76.23%, and the other components such as anisyl acetone, anisaldehyde, p-allylanisole, p-cumic aldehyde and p-allylpen take up more than 10%.     

采用同时蒸馏萃取-气质联用技术分析不同等级传统郫县豆瓣中挥发性风味物质

以二氯甲烷为溶剂,采用同时蒸馏萃取技术(SDE)提取不同等级传统郫县豆瓣中的挥发性风味物质,并通过气相色谱质谱联用(GC-MS)技术进行分离鉴定。在3类传统郫县豆瓣中,共检测出挥发性风味化合物109种,主要为酯类、醇类、醛类和酮类等化合物。在特级豆瓣中,油酸甲酯(14.54%)、异戊醇(10.34%)、苯乙醇(3.54%)、异戊醛(8.30%)相对含量较高,且2-羟基-3-戊酮(12.25%)仅在此等级被检出;一级豆瓣中,油酸甲酯(8.27%)、异戊醇(4.96%)、芳樟醇(1.57%)、异戊醛(3.07%)、4-乙基-2-甲氧基苯酚(3.56%)相对含量较高;二级豆瓣中,乙酸乙酯(15.22%)、异戊醇(4.73%)、2-甲基丙醇(1.21%)、异戊醛(4.20%)相对含量较高。     

污水中挥发性有机化合物的顶空／GC／MS分析

本文介绍了利用顶空／ＧＣ／ＭＳ技术，对污水中的挥发性有机化合物进行定性分析，共检出有机化合物２１种，其中烷基取代苯１６种，含氮化合物１种，其他类４种     

饮用水生产中痕量挥发性有机污染物的监测分析

采用毛细管色谱-质谱联用分析技术,结合吹扫捕集直接对邯郸市地表水源水及自来水中痕量挥发性有机物进行检测分析,检测发现地表水及自来水共有21种挥发性有机污染物,其中包括酚类、氯代烃、脂肪烃、芳烃等毒性较强的有机物。分析发现这些挥发性有机物主要来自石油、焦化、农药和制药污水。     

Extraction of essential oil from shaddock peel and analysis of its components by gas chromatography-mass spectrometry

1INTRODUCTION Essentialoilismainlycomposedofterebenes,sesquiterpenes,dienesandtheirredoxderiva tives[1].Thereareseveralmethodstoextractes sentialoilsfromplants,suchassqueeze,solvent leaching,steamdistillation,supercriticalcarbon dioxideextractionandthenewermicrowave aid method[27].Distillationiswidelyusedowingtoitsadvantagesofsimpleequipments,easyoperation andlowcost.However,thedisadvantagesofdis tillationareobvious,suchaslongextractiontimeandlowyield.Squeezegivesnativescentandgood qualit…     

以气质联用技术对白补药中挥发性成分的分析

为了寻找白补药的应用基础,确定白补药中挥发性物质的主要成分,用气相色谱-质谱联用技术对白补药石油醚浸膏的化学成分进行研究.用75%的乙醇提取白补药,将所得浸膏加水稀释后用石油醚萃取,再用气相色谱-质谱联用技术对石油醚浸膏进行分析,共分离出53个峰.通过中文数据系统检索和质谱资料核对,鉴定出其中46个化合物,其中主要成分为棕榈油酸甲基酯(质量分数28.94%)、硬脂酸甲酯(质量分数6.47%)、3,4,5,6-四甲基-2,5-辛二烯(质量分数5.42%)、6,10,14-三甲基-2-十五烷酮(质量分数5.07%)等.通过鉴定明确了白补药中石油醚部分的主要成分,为该植物的开发利用提供了科学依据.     

Component analysis of volatile oil from Illicium Verum Hook. f.

Volatile oil was extracted from Illicium Verum Hook. f. by using steam distillation. 41 kinds of compounds were separated and identified by GC/MS, and their relative contents were determined by normalization method. Among 41 identified compounds, there are 14 hydrocarbon components and 22 oxygenated hydrocarbon derivatives, and a small amount of nitrogenous compounds. The main component is anethole, accounting for 76.23%, and the other components such as anisyl acetone, anisaldehyde, p-allylanisole, p-cumic aldehyde and p-allylpen take up more than 10%. Foundation item: Science Foundation of Education for Hunan Province (No. 00C324) Biography of the first author: YAN Jian-hui, associate professor, doctorate candidate, born in 1958, majoring in applied chemistry.