基于顶空固相微萃取-气质联用技术分析聚氨酯海绵中挥发性物质成分

为确定聚氨酯海绵中的挥发性物质成分,采用固相微萃取方法进行聚氨酯海绵中挥发性物质提取,并利用气质联用技术进行定性分析,为改进聚氨酯海绵加工工艺提供依据.对萃取样品温度、萃取纤维头吸附时间及脱附时间进行优化.结果表明:在试验条件下共检测出苯酚、N-甲基苯胺、异辛酸、2,6-二叔丁基-4-甲基苯酚和4-氰基苯甲酸乙酯5种挥发性化合物.     

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.     

固相微萃取/气-质联用分析香菇挥发性香味成分

使用Carboxen/PDMS纤维固相微萃取/气-质联机分析了香菇的挥发性香味成分,考察了萃取时间、萃取温度对所鉴定出的化合物数量和总质量分数的影响,确定了固相微萃取的优化条件为：萃取时间45 min,萃取温度60℃,此时共检出43种挥发性成分,对香菇风味有贡献的化合物：含氧杂环化合物7种,含硫化合物9种,醛类5种,醇类6种,酮类3种,其中含量较高的成分为二甲基二硫醚（4.36%）、二甲基三硫醚（13.36%）、1,2,4-三硫杂环戊烷（3.70%）、1-辛烯-3-醇（1.11%）.     

GC—MS联用技术分析徐长卿挥发性化学成分

采用GC．MS联用技术结合程序升温保留指数首次对山东平邑产徐长卿的不同药用部位的挥发油成分进行定性定量分析．共定性出29种挥发性化学成分,地下部分（根及根茎）15种,地上部分（茎和叶）22种,分别占二者挥发油总含量的99．64％和96．51％,共有组分8种．徐长卿地下和地上部分的挥发油主要成分为丹皮酚和邻羟基苯乙酮,其中邻羟基苯乙酮为新发现的主要化合物．二者中丹皮酚的含量分别为88．45％和66．30％,邻羟基苯乙酮的含量分别为8．89％和16．99％．徐长卿地下部分的挥发油含量比地上部分多,二者存在显著性差异．     

云南松花苞挥发性成分分析

采用氯仿提取云南松花苞中的化学成分,经GC/MS分析,从云南松花苞挥发油中分析鉴定出了49个挥发性成分,占峰面积的58.89%。化合物类型包括单萜、倍半萜、二萜、脂肪族和酚类化合物,其中二萜和单萜为主要成分;质量分数最高的是松香酸(18.91%),其次为脱氢松香酸(10.20%)和十二氢化-1,4a-二甲基-7-(1-甲基乙基)-1-菲甲酸(10.20%)。     

长白鱼鳞云杉挥发性成分的气相色谱 - 质谱分析

采用水蒸气蒸馏法提取长白鱼鳞云杉中的挥发性成分,利用气相色谱 - 质谱联用(Gas chromatography - mass spectrometry, GC - MS)技术对提取的挥发性成分进行了分离和检测,并用峰面积归一化法计算了各成分的相对百分含量.实验结果显示:长白鱼鳞云杉挥发性成分的提取率为0.86%,在检测出的76个峰中共鉴定出butyl - 2 - ethylhexyl phthalate(相对百分含量为25.32%)、油酸(相对百分含量为14.28%)、十六酸(相对百分含量为10.44%     

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.     

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。     

GC-MS联用技术分析单叶细辛超临界CO2萃取物成分

分析了单叶细辛超临界流体萃取物的化学成分。采用超临界CO2萃取技术,对单叶细辛在萃取温度35℃、萃取压力30 MPa、萃取时间2 h条件下得到的萃取物组分进行GC-MS分析。共分离出64个组分,通过MS库检索并鉴定了其中60个组分。结果表明:双叶细辛超临界CO2萃取物的化学成分主要为α-亚麻酸、棕榈酸、亚麻酸甲酯、2,4,4-三甲基-3-(3-氧代丁基)-2-环己烯-1-酮等。     

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.     

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.     

草酸二乙酯与苯酚酯交换反应产物的气相色谱-质谱分析

采用气相色谱-质谱联用(程序升温)的方法,对MoO3/SiO2催化剂催化草酸二乙酯与苯酚酯交换反应的反应产物进行了分析.结果表明,草酸二乙酯与苯酚酯交换反应生成草酸二苯酯、乙基苯基草酸酯两种反应产物.     

Determination of constituents of essential oil from Angelica sinensis by gas chromatography-mass spectrometry

Gas chromatography-mass spectrometry （GC-MS） coupled with chemometric resolution upon twodimensional data was employed to analyze the constituents of essential oils of Angelica sinensis. Constituents in essential oils of Angelica sinensis root were identified by GC-MS with the help of subwindow factor analysis （SFA） method resolving two-dimensional original data into mass spectra and chromatograms. 76 of 97 separated constituents in essential oil of Angelica sinensis root were identified and quantified, and they account for about 91.36% of the total content. The results show that ligustilide, butylene phthalide, 2-methoxy-4-vinylphenol, carvacrol, alloocimene, 2,6,6-trimethylbicyclo-[3,1,1] hept-2-ene are the main constituents in essential oil of Angelica sinensis root.     

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%）。     

Determination of constituents of essential oil from Angelica sinensis by gas chromatographymass spectrometry

1INTRODUCTION TraditionalChinesemedicines(TCMs)are veryimportantduetotheirextensiveuseinpre ventingandcuringmanydiseasesforhumans.Al thoughonlysomecompoundsmightberesponsible forpharmaceuticaleffects,traditionalChinese medicinesusuallycontaintoomanycomponentsandformaverycomplexsystem,whichmakesthe screeningandanalysisofbioactivecomponentsex tremelydifficult[1]comparedwiththoseofwesternmedicines.Whensuchcomplexsamplesareana lyzed,itiscommonthatdifferentcontentsof multi componentsandgreatd…     

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…     

加速溶剂萃取/气相色谱-质谱法分析朝鲜淫羊藿挥发油成分

为探究朝鲜淫羊藿挥发油的化学成分,采用加速溶剂萃取法（ASE）提取朝鲜淫羊藿挥发油,气相色谱-质谱联用（GC/MS）分析检测,在完全随机设计优化ASE的萃取条件下,萃取收率4.0%,通过NIST98谱图库检索,确认挥发油中包含91种化合物,并用峰面积归一化法,求得各化学成分在挥发油中的质量分数.结果表明：朝鲜淫羊藿挥发...     

Comparison of simultaneous distillation extraction and solid-phase micro-extraction for determination of volatile constituents in tobacco flavor

1INTRODUCTION Manyresearchershavestudiedcigarettesmokeforspecificcompoundssuchaspolynucleararomatichydrocarbons(PAHs)andtobaccoflavoradditives[15].Tobaccoflavoradditivesarethees sentialmaterialsincigaretteproduction,andtheuseofvarioustobaccoflavoradditivesisoneofthecoretechniquesintobaccoindustry.Overthepasttwodecades,therehasbeenanincreasedinterestinandusageoftobaccoflavoradditives.Tobaccoflavorsareaddedtoimprovethephysicochemicalcharacterofthecigarette,modifythebaseflavorofthesmokeande…