苦杏仁挥发油化学成分的微波-同时蒸馏萃取GC-MS分析

报道了用微波照射－同时蒸馏萃取法提取苦杏仁挥发性物质，测得苦杏仁挥发油的含量为4.5%（ω），利用GC－MS法分离确认出18种化学成分，用峰面积归一化法通过化学工作站数据处理系统得出各化学成分在挥发油中的相对含量；其中主要成分为苯甲醛，占总挥发油的89.1%；又用加成分解法分离出苯甲醛，并用IR、EI－MS法对其进行分析鉴定加以确认。     

黄柏挥发性化学成分分析

报道了用同时蒸馏－萃取装置（SDE）提取黄柏的挥发性物质,测得黄柏挥发油的含量为0．45％,用GC／MS法从黄柏挥发油中分离并确认出41种化学成分;用峰面积归一化法通过化学工作站数据处理系统得出各化学成分在挥发油中的百分含量,其中主要成分为酮类（16．38％）、醛类（13．94％）、醇类（8．27％）、酚类（50．38％）、酸类（2．18％）、其他类成分仅占3．33％,共占总检出量的97．5％。     

酸枣仁中挥发性化学成分分析

报道了用蒸馏-萃取法提取酸枣仁中挥发性物质，测得酸枣仁挥发油的含量为10．40％，用GC／MS法从酸枣果肉挥发油中分离并确定出38种化学成分。用峰面积归一化法通过化学工作站数据处理系统，得出各化学成分在挥发油中的含量。其中主要成分为酯类化合物占挥发油总量的76．12％，其次为酸类化合物为7．65％，醇类化合物为3．43％，醚类化合物为2．16％，烷烃化合物为4．61％，其它类化合物仅占4．85％。共占酸枣仁中挥发油总量的98．82％。     

酸枣果肉中挥发性化学成分分析

报道了用蒸馏-萃取法提取酸枣果肉中挥发性物质，测得酸枣果肉挥发油的含量为1．80％，用GC／MS法从酸枣果肉挥发油中分离并确定出43种化学成分。用峰面积归一化法通过化学工作站数据处理系统，得出各化学成分在挥发油中的相对百分含量。其中主要成分为酸类化合物占挥发油总量的52．26％，酚类化合物为9．34％，酯类化合物为23．05％，醛类化合物为2．77％，醚类化合物为2．66％，烷烃化合物为1．89％，其它类化合物仅占3．77％。共占酸枣果肉中挥发油总量的95．62％。     

千山野菊花挥发性化学成分的提取与分析

报道了用蒸馏-萃取法和同时蒸馏-萃取法提取千山野菊花中挥发性物质，测得用两种方法提取的千山野菊花挥发油含量分别为6．1％和7．0％，用GC／MS法从千山野菊花挥发油中分别分离并确定出34种和29种化学成分，分别占千山野菊花挥发油总检出量的89．47％和90．72％，用峰面积归一化法得出各类化学成分在挥发油中的相对百分含量。     

酸枣果肉中挥发性化学成分的提取及分析

报道了用蒸馏-萃取法和同时蒸馏-萃取法提取酸枣果肉中挥发性物质,测得两种方法提取的酸枣果肉挥发油含量分别为1．80％和2．30％。用GC／MS法从酸枣果肉挥发油中分别分离并确定出43种和28种化学成分,分别占酸枣果肉挥发油总检出量的95．62％和94．88％。用峰面积归一化法通过化学工作站数据处理系统,得出各化学成分在挥发油中的相对百分含量。     

臭椿籽挥发油的化学成分分析

采用水蒸气蒸馏法对甘肃天水产的臭椿籽挥发油进行提取，挥发油得率约为2．1％(w)；用气相色谱-质谱联用技术对挥发性成分进行了分析，鉴定了43个化合物，占挥发油相对含量的96．3％；主要成分为脂肪酸及酯、脂肪烃及甾族化合物，其中含量较高的有亚油酸、油酸、蓖麻酸和蓖麻酸甲酯。     

GC-MS分析南方红豆杉种子中的挥发油

采用水蒸气蒸馏法提取南方红豆杉种子中的挥发油，测得南方红豆杉种子挥发油的收率为2．5％。通过GC-MS技术分析了南方红豆杉种子中挥发油的化学成分。按照GC／MS通用法则，初步确定了24种化合物的结构。并用峰面积归一化法得出在挥发油中的各化学成分。其中主要成分酸类占挥发油总量的81．28％．其次的烷烃类化合物为12．74％，醛类化合物为1．80％，不饱和烷烃类化合物1．44％，醇类化合物占0、89％，酯类化合物为0．52％，胺类化合物为0．34％。这几类物质占种子中挥发油总量的99．01％。     

GC/MS法分析油松节挥发油化学成分

用气相色谱-质谱法对山东昆嵛山产油松节挥发油进行化学成分的分析。采用水蒸气蒸馏法从油松节中提取挥发油。采用不同类型的毛细管柱进行分析，找出最佳分析条件，用归一化法测定其含量，并用气相色谱-质谱法对化学成分进行鉴定。共鉴定了48个成分，占挥发油总成分的84％以上。结果表明，此方法稳定可靠，重现性好，适用于中药挥发油的化学成分分析。     

茶条木挥发油的化学成分

采用毛细管气相色谱－质谱联用法对茶条木挥发油化学成分进行了研究,经毛细管普分离出１３４个峰,共确认了其中１０１种成分,所鉴定化合物的含量占全油的７８．０８％。用气相色谱面积归一化法测定了各成分的相对含量,其主要化学成分为二苯胺、棕榈酸甲酯、十六酸等。     

谱图检索结合二级质谱定性分析烟草中挥发性成分

采用同时蒸馏萃取法提取烟叶中的挥发性成分,利用气相色谱-质谱联用仪(GC-MS)分离测定,通过谱库检索和匹配度定性结合色谱保留指数方法鉴定烟叶中挥发性成分,并引入离子阱二级质谱对谱库检索匹配度差距小、含量低,背景干扰大的物质准确定性.采用谱图检索结合二级质谱定性共鉴定144个化合物,其中104个化合物在烟草挥发性成分的文献中已有报道,报道中有9个化合物是通过二级质谱定性,其余40个化合物还未见报道.结果表明,离子阱二级质谱定性的引入提高了对未知化合物定性的准确性和可靠性,适合于烟叶这类复杂植物体系的化学组分研究.     

气相色谱/质谱法分析曼陀罗果实挥发油的化学成分

用水蒸汽蒸馏法从曼陀罗果实中提取挥发油,并用气相色谱/质谱(GC/MS)联用技术对其化学成分进行分离和结构鉴定,用峰面积归一化法确定各成分的相对含量。结果确定了68种化合物,占挥发油总量的82.83%,其主要成分为6-戊基-5,6-二氢化吡喃-2-酮(9.13%)、3,7,11,15-四甲基-2-十六碳烯-1-醇(6.71%)、二苯酮(6.16%)和1-己醇(6.10%)等。     

气相色谱-质谱法测定姜黄挥发油化学成分

采用水蒸气蒸馏法提取姜黄挥发油,用气相色谱－质谱联用技术分离和鉴定姜黄挥发油的化学成分。经计算机ＮＢＳ谱库检索,发现姜黄挥发油中至少有１５个峰,鉴定出α－姜黄烯、α－姜烯、桉叶油素和球姜酮等１５种组分;另外还有１－（３－环戊基醛）－２,４－二甲基苯、β－倍半水芹烯、大根香叶酮、大根香叶烷、顺双环［３,３,１］酮－２－烯－９－醇等成分。姜黄挥发油中主要成分为α－姜黄烯。     

Volatile organic compounds of Angelica gigas Nakai, Korean medicinal herb

The study was performed to find out the profile of volatile flavor components from the aromatic medicinal plant, Angelica gigas Nakai. The volatile organic compounds of A. gigas Nakai were extracted by simultaneous steam distillation and extraction (SDE) method, and identified by gas chromatograph/mass spectrometric (GC/MS) analysis. A total of 116 compounds, including 40 hydrocarbons, 37 alcohols, 15 esters, 12 aldehydes, 7 ketones, and 5 miscellaneous were identified and quantified. Among them, 75 volatile organic compounds were detected which make up 90.52% of total volatile content. alpha-Pinene was detected as the prime volatile component which accounted for 30.89% of total volatile content and 2,4,6-trimethyl heptane, camphene, alpha-limonene, beta-eudesmol, vervenol, alpha-murrolene, and sphatulenol were detected as the major components of A. gigas Nakai.     

Comparative analysis of the volatile components in cut tobacco from different locations with gas chromatography-mass spectrometry (GC-MS) and combined chemometric methods

A combined approach of subwindow factor analysis and orthogonal projection resolution was used to analyze the volatile components of cut tobacco samples from different sources. After extracted with simultaneous distillation and extraction method, the volatile components in cut tobacco from five different locations were detected by GC-MS. Then, the qualitative and quantitative analysis of the volatile components of cut tobacco from Changde area was completed with the help of subwindow factor analysis resolving two-dimensional original data into pure mass spectra and chromatograms. One hundred and two volatile components among 138 separated peaks were identified and quantified, accounting for about 88.90% of the total content. Finally, orthogonal projection method was used to extract the common peaks from different locations. Among the identified components, there were 74 components coexisting in five studied samples although the relative content of each component showed difference to some extent. The results showed a fair consistency in their GC-MS fingerprints. It was the first time to apply orthogonal projection method to compare different cut tobacco samples, and it reduced the burden of qualitative analysis as well as the subjectivity. The obtained results proved the combined approach powerful for the analysis of complex cut tobacco samples. The developed method can be used to compare the sameness and differences of cut tobacco from different sources and for quality control of cigarette production and materials.     

多花蔷薇花净油化学成分研究

多花蔷薇(Rose multiflora. cathayensis)又名红刺玫、刺花,系多年生落叶灌木,野生于甘肃省陇南山区,生长在海拔500～1900 m的山峰、河岸或山坡缘及灌木丛林中,花的资源丰富,是甘肃省目前需开发的野生芳香植物之一,多花蔷薇花为粉红色,花期为5月中旬至5月底,花中含芳香油,可用作化妆、皂用香精等,有关多花蔷薇花的化学成分,未见文献报道,我们将多花蔷薇花的石油醚浸膏用乙醇在0℃脱蜡3次得净油,再经硅胶柱层析分离得纯     

顶空-气相色谱-质谱联用分析桂花和叶中挥发性成分

采用谱库检索结合准确质量测定、保留指数、串联质谱技术的多维定性分析策略鉴定化合物, 能够提高定性分析的效率和准确性. 运用顶空-气相色谱-四极质谱、顶空-气相色谱-飞行时间质谱以及顶空-气相色谱-串联质谱联用技术对桂花样品进行了分析检测, 并采用多维定性分析思路对检出的挥发性成分进行了鉴定. 结果共确认出47种挥发性成分, 其中单萜类和倍半萜类化合物为主要组分. 该定性分析策略准确可靠, 可以广泛应用于复杂样品挥发性成分的定性分析中.     

Identification of volatile basic components in tobacco by headspace liquid-phase microextraction coupled to matrix-assisted laser desorption/ionization with Fourier transform mass spectrometry

A method incorporating headspace liquid-phase microextraction (HS-LPME) coupled to matrix-assisted laser desorption/ionization (MALDI) with Fourier transform mass spectrometry (FTMS) was established to analyze volatile basic components in tobacco. The sample preparation volume for MALDI-MS was compatible with the volume of the solvent microdrop in the HS-LPME procedure. The pH and the polarity of the solvent for HS-LPME were adjusted by choice of the MALDI matrix and matrix additive. Based on the elemental composition and tandem mass spectrometry information, 25 volatile nitrogenous compounds in tobacco were detected and identified. The approach is fast and sensitive, and has the potential for automation for high-throughput analysis. This approach offers an alternative method for analysis of trace volatile organic compounds in complex samples.     

顶空固相微萃取-气相色谱-质谱分析发酵香肠挥发性成分

采用固相微萃取-气相色谱-质谱(SPME-GC-MS)联用分析技术对发酵香肠挥发性成分进行了分析。共鉴定了33种化合物。结果表明，发酵香肠的挥发性成分主要为醇类、酮类、酯类、有机酸类、酚类及醛类等。