松毛虫性信息素微量成分鉴定方法的研究

采用气相色谱-质谱分析确认了顺-5-,反-7-十二碳二烯乙酸酯是思茅松毛虫性信息素腺体的主要成分（次要成分由于含量极微且受杂质干扰,未能获得全扫描质谱图）。利用高分辨率毛细管气相色谱分析了思茅松毛虫性信息素腺体提取物的酯基转移和乙酰化反应的衍生物,进一步确认了顺-5-,反-7-十二碳二烯醇是思茅松毛虫性信息素腺体中的微量成分。探讨了功能团相互转换微量化学反应法鉴定松毛虫性信息素腺体中微量成分功能团和立体构型的优点。强调了性信息素微量成分鉴定工作在昆虫化学通讯系统研究中的重要性。     

紫花野菊,小红菊与野菊花挥发油化学成分的比较研究

报道了用毛细管气相色谱和色－质谱联用方法分离鉴定紫花野菊和小红菊的挥发油化学成分。初步鉴定了反－丁香烯，β－蒎烯，１，８－桉叶素等为主的二十八种成分，并测定了它们的含量。同时与野菊花进行了比较。结果表明两者与野菊花主要成分有所不同。     

纸张上光油关键物质的成分分析

利用色相色谱／质谱联用技术，傅立叶红外及裂解－气相色谱／质谱联用技术，对印刷用上光油的关键成分进行了分析，共鉴定出７种挥发性组分，２种高分子聚合物。     

气相色谱-质谱方法检测磺酸类阴离子表面活性剂

使用K I/DMF/(CF3CO)2O还原衍生方法,结合气相色谱-质谱(GC/MS)联用技术对磺酸类化合物进行了结构鉴定和成分分析。实验结果表明,这种新的还原衍生方法不仅方便快速、条件易控,而且产物稳定,具有良好的气相色谱-质谱行为,可以很好地解决磺酸类阴离子表面活性剂有效成分分析鉴定的难题。     

紫花野菊、小红菊与野菊花挥发油化学成分的比较研究

报道了用毛细管气相色谱和色－质谱联用方法分离鉴定紫花野菊和小红菊的挥发油化学成分。初步鉴定了以反－丁香烯,β－蒎烯,１,８－桉叶素等为主的二十八种成分,并测定了它们的含量。同时与野菊花进行了比较。结果表明两者与野菊花主要成分有所不同。     

气相色谱/离子阱质谱中组分图谱提取的主成分分析方法

由于离子阱质谱中容易发生分子-离子反应, 致使质谱图发生改变, 影响与主要由四极质谱建立的参照图谱的匹配效果. 本文采用主成分分析方法对气相色谱/离子阱质谱中组成色谱峰的所有全扫描质谱进行提取, 提取后的质谱图能够有效克服分子-离子反应和基线干扰的影响, 应用不同的匹配算法均能很好地和参照图谱匹配, 和传统方法相比匹配度显著提高, 对目标化合物定性准确.     

后目标分析法用于盐益智仁挥发性成分的顶空-气相色谱-四级杆/飞行时间质谱分析

后目标分析法用于中药挥发性成分分析,可对复杂基体实行快速、准确、宽范围的分析,成功解决了化合物因共洗脱、柱流失等干扰无法定性的问题. 气相色谱-质谱检测的结果运用图谱检索结合保留指数和准确质量的后目标分析方法从盐益智仁挥发性成分中共鉴定出119个化合物. 通过保留指数推算保留时间,结合窄质量窗口提取离子色谱图的后目标分析方法降低了背景干扰,提高选择性,有利于复杂基体中痕量成分的分析,又鉴定出3个目标化合物. 此外,由串联质谱推测化合物裂解规律,辅以二级质谱中碎片离子准确质量,又鉴定出一个化合物.     

串级质谱法鉴定食品中苏丹红一号

利用气相色谱串级质谱(GC/MS/MS)法定性定量鉴定食品中染料苏丹红一号,建立了离子阱气相色谱-质谱联用仪分析食品中苏丹红一号染料的方法。结果表明,苏丹红一号在0.045~0.90 mg.L-1浓度范围内呈线性关系,相关系数为0.999 0,检测下限为0.004 5 mg.kg-1,回收率在83.1%~103.2%之间。方法具有样品预处理简单、灵敏度高、检出限低于现行国家标准水平,确证能力强等特点,满足食品中苏丹红一号的定性定量监测。     

超高效液相色谱-质谱联用法与气相色谱-质谱联用法分析水性印油印记的主要成分

应用超高效液相色谱-质谱联用技术(UHPLC-MS)与气相色谱-质谱联用技术(GC-MS),对环保水性印油中的主要成分(主要颜料与挥发性物质)进行了定性分析。通过超声提取与离心对样品进行预处理后,在ZORBAX Eclipse Plus Phenyl-Hexyl (50 mm×4.6 mm, 1.8 μm)液相色谱柱,15 mmol/L乙酸铵水溶液-乙腈为流动相,在UHPLC-MS负离子电喷雾电离条件下以选择离子监测模式定性分析染料及颜料;采用HP-INNOWAX (30 m×0.25 mm, 0.25 μm)气相色谱柱进行GC-MS全扫描,定性分析挥发性物质。研究确认水性印油中的主要颜料成分是酸性红R、水溶曙红Y与颜料红112,主要挥发性物质是甘油、1,2-丙二醇等。本方法快速、准确,可以满足物证鉴定工作中对印记的检测需要,有助于法庭科学中对印油印记的种类区分。     

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.     

Tracking juniper berry content in oils and distillates by spectral deconvolution of gas chromatography/mass spectrometry data

The complex nature of botanicals and essential oils makes it difficult to identify all of the constituents by gas chromatography/mass spectrometry (GC/MS) alone. In this paper, automated sequential, multidimensional gas chromatography/mass spectrometry (GC-GC/MS) was used to obtain a matrix-specific, retention time/mass spectrometry library of 190 juniper berry oil compounds. GC/MS analysis on stationary phases with different polarities confirmed the identities of each compound when spectral deconvolution software was used to analyze the oil. Also analyzed were distillates of juniper berry and its oil as well as gin from four different manufacturers. Findings showed the chemical content of juniper berry can be traced from starting material to final product and can be used to authenticate and differentiate brands.     

南方马尾松松针挥发油成分的气相色谱/质谱分析

采用水蒸了蒸馏方法从中国南方新鲜马尾松松针中提取出挥发油,利用气相色谱／质谱（ＧＣ／ＭＳ）联用技术对其化学成分进行了分析,共分离出９１个峰,各组分经数据库标准图谱核对,得到分子结构。其中３６种化合物的含量较高,占总离子流的８３．０５％,主要是单萜和倍半萜,以及少量萜烯的醇、酯类化合物。     

红收获蚁信息素的鉴定

利用色谱－质谱联机技术，在红收获蚁P.barbatus和P.maricopa的毒腺体样品中检测到召引信息素甲基吡嗪（MP）、2，5－二吡嗪（DMP）、3－乙基－2，5－二甲基吡嗪（EDMP）、和三甲基吡嗪（TMP）。利用特征离子色谱技术，在P.barbatus样品中还检测到了含6个碳原子侧链烃基的吡嗪X。根据吡嗪X的质谱图推测其结构为3－仲丁基－2，5－二甲基吡嗪（BDMP）。P.barbatus中DMP，TMP和EDMP的平均相对百分比分别为60.71、26.49、12.80；标准偏差分别为6.91、4.92、5.11;P.maricopa中平均相对百分比和标准偏差分别为47.48、20.35、32.17和15.05、4.05、15.44。     

单叶蔓荆子挥发油成分的GC/MS分析

采用气相色谱／质谱（ＧＣ／ＭＳ）联用技术对山东泰山产单叶蔓荆子挥发油的化学成分进行了分析,分离出３０多个峰,确认了其中２８种成分,占总离子流的９５％以上,并对挥发油的主要化学成分Δ３－蒈烯,用气相色谱／傅里叶红外光谱（ＧＣ／ＦＴＩＲ）法进行了验证。     

Analysis of gin essential oil mixtures by multidimensional and one-dimensional gas chromatography/mass spectrometry with spectral deconvolution

The composition of essential oils and their mixtures used to formulate gin is usually too complex to separate all sample components by standard capillary gas chromatography (GC). In particular, minor constituents that possess important organoleptic properties can be masked by co-elution with major sample components. A solution is provided that combines gas chromatography/mass spectrometry (GC/MS) with "interactive" spectral deconvolution software. Sequential two-dimensional (2D) GC/MS is used to produce a target compound library, with orthogonal GC-GC providing the separation power required to obtain peak retention times and the corresponding mass spectra needed for the deconvolution database. The combination of these two techniques, mass spectral deconvolution and automated sequential 2D-GC/MS, offers a very effective synergy for both identifying key constituents that determine the perception of flavor and aroma and the quality control needed to analyze mixtures of complex essential oils.     

气相色谱-质谱联用分析花椒挥发油的成分

 采用气相色谱 质谱联用技术对陕西富平产花椒挥发油的成分进行了分析 ,分离出了 17个峰 ,鉴定出了相对峰面积大于 1 0 %的组分共 16个 ,用峰面积归一化法定量测定了已确定组分的相对含量 ,其占挥发油总质量的95 %以上。     

固相微萃取-气相色谱/质谱测定植物叶片中的挥发性物质

采用固相微萃取（SPME)方法吸附植物叶片中的挥发性物质,然后采用气相色谱/质谱法（GC/MS）分析了挥发性物 质的成分。在45 ℃水浴温度下,采用Polyacrylate(85 μm)固相微萃取头,在广口瓶中植物叶片的上方顶空吸附60 min,然后进行GC/MS分析。结果表明,植物叶片中的挥发性物质得到了很好的分离,受山楂叶螨(Tetraychus vienneis) 危害严重的植物的完好叶片中的挥发性物质均含有顺-3-己烯-1-醇乙酸酯、顺-3-己烯-1-醇丁酸酯和α-法呢烯,且含量 较大。初步确定这些物质是对山楂叶螨具有引诱作用的主要物质,从而为利用天然生物活性物质防治山楂叶螨提供了理论 依据。     

Comprehensive Two-Dimensional Gas Chromatography with Mass Spectrometric Detection (GC × GC/MS) Applied to the Analysis of Petroleum

Comprehensive two-dimensional gas chromatography coupled with mass spectrometric detection (GC × GC/MS) is a three-dimensional analytical method. In its application to petroleum analysis, the high peak capacity of GC × GC produced chromatographic resolution of over 750 peaks from a marine diesel fuel. The MS detector provided a full-scan mass spectrum for each resolved peak. The integration of an MS detector with GC × GC provides increased capability to identify minor components, determine members of homologous series, and characterize ordered peak patterns of related components that are visible in the GC × GC chromatogram.     

GC‐MS of amaryllidaceous galanthamine‐type alkaloids

Galanthamine‐type alkaloids produced by plants of the Amaryllidaceae family are potent acetylcholinesterase inhibitors. One of them, galanthamine, has been marketed as a hydrobromide salt for the treatment of Alzheimer's disease. In the present work, gas chromatography with electron impact mass spectrometry (GC‐EIMS) fragmentation of 12 reference compounds isolated from various amaryllidaceous plants and identified by spectroscopic methods (1D and 2D nuclear magnetic resonance, circular dichroism, high‐resolution MS (HRMS) and EIMS) was studied by tandem mass spectrometry (GC‐MS/MS) and accurate mass measurements (GC‐HRMS). The studied compounds showed good peak shape and efficient GC separation with a GC‐MS fragmentation pattern similar to that obtained by direct insertion probe. With the exception of galanthamine‐N‐oxide and N‐formylnorgalanthamine, the galanthamine‐type compounds showed abundant [M]^+. and [M‐H]⁺ ions. A typical fragmentation pattern was also observed, depending on the substituents of the skeleton. Based on the fragmentation pathways of reference compounds, three other galanthamine‐type alkaloids, including 3‐O‐(2′‐butenoyl)sanguinine, which possesses a previously unelucidated structure, were identified in Leucojum aestivum ssp. pulchelum, a species endemic to the Balearic islands. GC‐MS can be successfully applied to Amaryllidaceae plant samples in the routine screening for potentially new or known bioactive molecules, chemotaxonomy, biodiversity and identification of impurities in pharmaceutical substances. Copyright © 2012 John Wiley & Sons, Ltd.     

Investigation by solid-phase microextraction and gas chromatography/mass spectrometry of trail pheromones in ants

The Dufour's gland content of workers of two ant species of the genus Messor has been analyzed by solid-phase microextraction and gas chromatography with mass spectrometry (GC/MS). The structures of the compounds in the pheromonal mixtures have been determined. In both cases only one intact gland, inserted in a properly dimensioned capillary vial, is sufficient to produce a clean and fully interpretable GC/MS profile. It is worth noting that, for the first time in Messor ants, farnesol has been detected as a minor component of glandular secretion in Messor capitatus.