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顶空-气相色谱-质谱联用分析桂花和叶中挥发性成分 总被引:9,自引:0,他引:9
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. 相似文献
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自动化静态顶空-气相色谱-质谱对天然香精中挥发性化学成分的快速分析 总被引:13,自引:3,他引:13
运用静态顶空-毛细管气相色谱-质谱法对天然香精中挥发性化学成分进行了分析,采用质谱和保留指数检索结合的方法对香精中挥发性成分进行定性分析;对香精顶空分析条件进行了优化,在香精样品中加入适量饱和NaCI溶液,显著地提高了低极性挥发性组分的分析灵敏度;从该香精中检出了68个化合物,将峰面积归一化结果大于0.1%的60种挥发性成分进行了定性分析,并通过保留指数分析对其中45种化合物进行了确认;分析结果表明:香精中含有萜类(30.3%)、萜类衍生物(11.7%)、酚醚类(17.0%)、脂肪酸酯(20.9%)和一些小分子的缩醛类化合物(17.7%),其中主要的挥发性成分为丁酸-1,1-二甲基-苯基乙酯(18.9%)、茴香脑(15.6%)、2-乙基-4-甲基-1,3-二氧戊环(9.8%)和β-石竹烯(7.7%);对方法精密度进行考察.相对标准偏差(RSD)在0.62—9.36之间。 相似文献
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通过对火场常见塑料载体与助燃剂混合燃烧残留物的分析,发展一种适用此类燃烧残留物的火灾物证鉴定方法,对火场中是否存在助燃剂进行判断,避免漏检情况的发生。应用热分析技术确定合适的闪蒸温度,在此温度下对塑料载体与助燃剂混合燃烧残留物进行闪蒸分析,并从实验条件选择、可行性分析、定性分析三方面对闪蒸技术进行评价。结果表明,闪蒸气相色谱-质谱(Flash GC-MS)技术可以检测到热塑性聚合物塑料载体与助燃剂混合燃烧残留物中残留的助燃剂特征组分,可对火场中是否存在过助燃剂进行辨别。闪蒸气相色谱-质谱技术丰富了现代火灾物证鉴定技术,能进一步辅助火灾物证鉴定工作,使鉴定结论更准确、可靠。 相似文献
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顶空固相微萃取-气相色谱-质谱分析发酵香肠挥发性成分 总被引:9,自引:0,他引:9
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。 相似文献
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复方祛风湿止痛药粉末中挥发性成分的静态顶空-气相色谱-质谱分析 总被引:3,自引:0,他引:3
利用静态顶空-毛细管气相色谱-质谱方法对复方祛风湿止痛药中挥发性成分进行了分析,运用质谱检索和保留指数对其中主要的60种挥发性成分进行了定性.该药中各种挥发性成分的相对含量分别为萜类(54.5%)、萜类衍生物(9.6%)、酚醚类(15.0%)和脂肪醇醛(8.5%),主要为β-古芸烯(20.5%)、蒿脑(14.5%)、β-蛇床烯(6.0%)和β-绿叶烯(5.7%).分析结果的相对标准偏差(RSD)在0.54%~8.39%之间. 相似文献
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采用动态微波辅助顶空固相微萃取结合气相色谱-质谱法测定芹菜叶中的挥发性和半挥发性化学成分。对水蒸气蒸馏、顶空固相微萃取、微波辅助顶空固相微萃取、动态微波辅助顶空固相微萃取等4种不同的前处理方法进行了比较,通过气相色谱-质谱分析,分别鉴定出20,17,36,41种化学成分,主要化合物为α-月桂烯、柠檬烯、β-顺式罗勒烯、β-芹子烯和(Z)-3-己烯-1-醇等。结果表明:动态微波辅助顶空固相微萃取是一种简单、快速、易操作,无需净化步骤,消耗样品量少,对于沸点较高的半挥发性物质的萃取效果优于微波辅助顶空固相微萃取的方法,可用于分析各类植物中的挥发性和半挥发性化学成分。 相似文献
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In present work,the volatile constituents of Curcuma longa L.,A.lancea (Thunb.) DC.,Foeniculum vulgare Mill,and Cinnamomun cassia Presl.have been analyzed by flash distillation/capillary gas chro-matography/mass spectrometry.The results are consistent with those obtained by conventional steam distillation extraction method.The optimum condition of flash distillation has been studied.The experimental results showed that this new technique proved to be a simple,rapid and efficient tool for microanalysis of volatile constituents of Chinese medicinal herbs. 相似文献
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MinMinLIANG MeiLingQI RuoNongFU 《中国化学快报》2005,16(5):659-662
We have investigated the use of flash evaporation, headspace solid-phase microextraction (HS-SPME) and steam distillation (SD) as sample concentration and preparation techniques for the analysis of volatile constituents present in Houttuynia cordata Thunb. The samples were analyzed by gas chromatography (GC) and identified by mass spectrometry (MS). Comparison studies were performed. It was found that the results obtained between Headspace solid-phase microextraction HS-SPME and SD techniques were in good agreement, Seventy-nine compounds in Houlluynia cordata Thunh were identified by MS. In flash evaporation, thirty-nine compounds were identified. Discrimination in the response for many constituents studied was not observed, which can be clearly observed in SD and HS-SPME techniques. As a conclusion, HS-SPME is a powerful tool for determining the volatile constitutes present in the Houttuynia cordata. 相似文献
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Essential oil composition of the leaves and stems of Meum athamanticum Jacq., from Spain 总被引:3,自引:0,他引:3
Palá-Paúl J García-Jiménez R Pérez-Alonso MJ Velasco-Negueruela A Sanz J 《Journal of chromatography. A》2004,1036(2):245-247
The essential oil of the leaves and stems of Meum athamanticum Jacq., has been extracted by steam distillation and analysed by gas chromatography (GC) and gas chromatography coupled to mass spectrometry (GC-MS). The monoterpene fraction was predominant while the sesquiterpene one was practically absent. The principal constituents have been identified as (E)-beta-ocimene (29.6%), gamma-terpinene (17.9%), terpinolene (17.0%) and p-cymene (9.7%). Our results show that the chemical composition of the essential oil obtained of the leaves and stems of M. athamanticum from Spain is different to that obtained from plants of Germany, Italy and France. 相似文献
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《Comptes Rendus Chimie》2016,19(6):754-765
Rosemary (Rosmarinus officinalis L.) is a perennial herb with an intensive aromatic flavor. Its most important chemical constituents are essential oils (e.g., 1,8-cineole and camphor) and antioxidants (e.g., carnosic acid and rosmarinic acid). The common methods to extract the essential oil of rosemary are steam or hydro distillation. The aim of this work is to investigate the residual antioxidants after hydro distillation, especially rosmarinic acid and carnosic acid. For this purpose, the hydro distillation water residues were analyzed by HPLC-UV. Moreover, the influence of the extraction duration on the concentration of the antioxidants was investigated. Also, the residual amount of these compounds in the leaves was examined. The total antioxidant activity of the extracts and of the pure compounds was determined by DPPH assays. It is shown that after 2.5 h of hydro distillation the amount of rosmarinic acid and the antioxidant activity in the water residue reaches a maximum value. In addition, the yield and the quality of the essential oil were investigated to draw a comparison between steam and hydro distillations of Moroccan rosemary leaves. 相似文献
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Palá-Paúl J Velasco-Negueruela A Pérez-Alonso MJ Sanz J 《Journal of chromatography. A》2001,923(1-2):295-298
The volatile constituents of the essential oil of Argyranthemum adauctum (Link.) Humphries extracted by steam distillation have been studied by GC-MS. A total of 60 compounds have been identified representing the 89.8% of the oil. The major constituents were found to be beta-pinene (27.4%) and santolinatriene (22.6%). This is the first report on the chemical compounds of the oil of this species. 相似文献
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千山野菊花挥发性化学成分的提取与分析 总被引:3,自引:0,他引:3
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。 相似文献
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Various sampling techniques including flash evaporation (FE), headspace solid-phase microextraction (HS-SPME) and steam distillation (SD) were compared for the gas chromatography-mass spectrometry of volatile constituents present in Houttuynia cordata Thunb (HCT). 2-Undecanone (22.21%) and houttuynum (7.23%) were predominant components of HCT samples obtained by HS-SPME whereas those levels were 3.95 and 3.60% in the same samples by FE and 25.93 and 6.60% in those by SD, respectively. SPME with polydimethylsiloxane (PDMS) fibre was more selective and particularly efficient for the isolation of biologically active compounds and afforded a higher yield of total compounds than FE and SD. A total of 60 compounds were detected in SPME extracts. While in FE and SD extracts, the detected compounds were 41 and 51, respectively. The total amount of compounds isolated by SPME was much larger than that isolated by FE or SD. Some minor constituents were isolated by SPME, but not by SD and FE. This carries great significance because of the importance of the oil volatiles to clinical therapy. HS-SPME is a powerful tool for determining the volatile constitutes present in the TCMs. 相似文献
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单叶蔓荆子挥发油成分的GC/MS分析 总被引:4,自引:0,他引:4
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。 相似文献