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采用固相微萃取-气相色谱-质谱法分离和鉴定树苔浸膏的香气成分,用归一化测定其相对含量。为使固相微萃取达到更高的效率,选用100μm PDMS的固相萃取头,萃取温度及时间为65℃和30min。共鉴定出62种化合物,其中33种为酯类化合物,占总香气成分峰面积的58%,为构成树苔浸膏典型苔清香香气特征的重要成分。 相似文献
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固相微萃取和同时蒸馏萃取与气相色谱/质谱法分析芥末膏制品的风味成分 总被引:15,自引:0,他引:15
采用固相微萃取和同时蒸馏萃取技术分离芥末膏制品的挥发性成分,用GC/MS分析鉴定,对总离子流色谱的峰面积进行归一化定量。共鉴定了22种化学成分,占总峰面积的99%以上,其中含硫化合物8种,含氮化物3种,含氧化合物11种。最主要的成分是异硫氰酸烯丙酯,其次是丙二醇,其他主要成分还有对羟基二叔丁基甲苯、油酸、9-十六烯酸、棕榈酸、5-甲基甲氢噻吩-2酮、二烯丙基二硫化物,异硫氰酸苯乙酯等。比较了各种萃取技术对分析结果的影响,同时蒸馏萃取法不能分离出水溶性成分如丙二醇等,在固相微萃取方法中,聚二甲基硅氧烷纤维头对极性较强的成分的取样效果不理想,聚乙二醇-二乙烯苯纤维头顶空取样的萃取效果最好。 相似文献
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采用顶空固相微萃取-气相色谱-质谱法(HS-SPME-GC-MS)系统分析了开花期和收获期种植在不同地块(中间地块、南面地块和北面地块)的香紫苏不同部位(根、花、茎、叶)中香气成分的变化.将新鲜的香紫苏全株样品自然晾干,将根、花、茎、叶分离后,各自粉碎后过筛,置于顶空瓶中进行HS-SPME处理,得到的目标物用DB-5M... 相似文献
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采用固相微萃取-气相色谱-质谱法分离和鉴定香樟籽的挥发性成分,用归一化法测定其相对含量。共分离出76种组分,鉴定出47种化合物,其含量占总挥发性成分的97.4%。主要挥发成分为樟脑(57.89%)、柠檬烯(12.68%)、α-蒎烯(4.42%)、莰烯(2.69%)、香橙烯(2.34%)、伞花烃(2.26%)及β-蒎烯(2.12%)。 相似文献
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猪油挥发油成分的气相色谱/质谱法分析 总被引:6,自引:0,他引:6
1 引 言油脂是人类的主要食品之一 ,其主要成分是脂肪酸甘油三酯 ,它参与人体正常生理代谢。油脂香气成分是其微量成分 ,含量一般在油脂总量的 1%以下 ,却构成其各自特征香气。奶油、玉米油、牛油等均有较详细的报道。本文以GC MS分析猪油香气成分 ,70种成分被确定。2 实验部分2 .1 主要仪器 HP5 973气质联用仪 (GC MS) ,HPINNOWAX 30m× 0 .2 5mm× 0 .2 5 μm毛细管柱 ,NIST98谱库。2 .2 GC MS条件 进样口温度 2 5 0℃ ,检测器温度 2 80℃ ,柱温 6 0℃ (2min) 2℃ min12 0℃ (1min) 10… 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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固相微萃取-气相色谱/质谱法分析白胡椒粉的风味成分 总被引:1,自引:0,他引:1
采用固相微萃取采集白胡椒粉的挥发性成分,用色谱/质谱法分析鉴定,并用总离子流色谱峰的峰面积进行归一化定量分析其风味成分,鉴定出石竹烯(20.88%),1-甲氧基-4-(2-丙烯基)苯(20.57%),β-水芹烯(15.27%),3-蒈烯(14.56%),1-甲基-3-异丙基苯(3.62%),β-蒎烯(2.69%),芳樟醇(2.69%),香叶烯(2.36%),墨榄香烯(2.10%),胡椒烯(1.32%)等48种化合物。 相似文献
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辣椒油化学成分的气相色谱-质谱分析 总被引:21,自引:0,他引:21
采用溶液进样和顶空固相微萃取进样,GC-MS分离鉴定,总离子流色谱的峰面积归一化法定量分析了辣椒油的化学成分;在溶液进样方法中,鉴定的主要成分相对含量依次为辣椒碱(37.0%)、亚麻酸乙酯(26.3%)、棕榈酸(10.9%)、二氢辣椒碱(10.1%)、邻苯二甲酸二乙基己基酯(1.2%)和硬脂酸(1.1%)等;在顶空固相微萃取方法中,鉴定的成分主要为易挥发的头香成分,依次为顺-2,4α,5,6,9,9α-六氢-3,5,5,9-四甲基-1H-苯并环庚烯(22.9%)、2,4α,5,6,7,8,9,9α-八氢-3,5,5-三乙基-1H苯并环庚烯(9.2%)、正十五烷(6.7%)、艾蒿脑(5.9%)、正戊酸己酯(5.2%)、正十六烷(3.3%)、麝香内酯(3.3%)、正十七烷(2.4%)及5,6,7,7α-四氢-4,4,7α-三甲基-2(4H)-苯并呋喃酮(2.2%)等。 相似文献
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本文建立了超声雾化顶空单滴微萃取-气相色谱-质谱(GC-MS)联用测定果汁中的β-月桂烯、D-柠檬烯和异戊酸叶醇酯含量的方法。考察了萃取溶剂、萃取时间、富集时间等影响芳香成分萃取效率的因素。在最优的实验条件下,对三种果汁中的芳香成分进行了分析,测得三种果汁中β-月桂烯、D-柠檬烯和异戊酸叶醇酯的含量分别为12.0~488.6μg·mL~(-1)、542.8~1.237×10~4μg·mL~(-1)和0.0470~498.5μg·mL~(-1)。方法的回收率范围为78.5%~110.4%,相对标准偏差为1.3%~4.4%。 相似文献
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C. C. Camarasu 《Chromatographia》2002,56(1):S131-S135
Summary A sensitive headspace SPME method for the extraction of residual solvents from pharmaceutical products has been developed
and optimized. It was found that minimizing sample and headspace volume has a beneficial effect on extraction efficiency.
At the same time the method reproducibility was seriously affected by reducing sample and headspace volume. The added air
volume was not found to have any significant influence on method sensitivity. The method showed reproducibilities of less
than 10% and detection limits as low as 1 ppb for benzene and dichloromethane. The headspace SPME method is around 1000 times
more sensitive than static headspace. The optimized parameters were headspace volume 1.5 mL, sample volume 10 μL, and extraction
time 30 min. The method was successfully applied to the identification of unknown residual solvents in three different proprietary
active drug substances and was successfully applied to the confirmation of the presence of benzene in a proprietary drug substance.
Presented at Balaton Symposium '01 on High-Performance Separation Methods, Siófok, Hungary, September 2–4, 2001 相似文献
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烟用香精的固相微萃取-气相色谱-质谱法分析 总被引:1,自引:0,他引:1
固相微萃取(Solid-phase Micoextraction,缩写为SPME)是近年来才发展起来的1种样品处理技术,可应用于环境土壤、水、食品、香精香料及烟草等样品中挥发和半挥发性有机物的分析.SPME的优点:不需任何溶剂、分析速度快(2~30 min可达吸附平衡)、灵敏度高、重现性令人满意、应用范围广、设备简单、成本低、可实现自动化. 相似文献
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Solid phase microextraction (SPME) then capillary gas chromatography with mass spectrometric detection have been used for determination of nine phenyl compounds in snow water in Beijing City. Headspace extraction with a fiber coated with 100 µm PDMS was used to extract the compounds. Extraction and desorption times were optimized at 8 and 2 min, respectively. Relative standard deviation (RSD) of the analytical method was found to be less than 5%. The linear range was wide and limits of detection were less than 5 ng mL−1 for the nine target analytes. Several phenyl compounds at ng mL−1 levels were detected in snow samples in Beijing, indicating the corresponding air pollution. 相似文献
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The applicability of solid phase microextraction (SPME) to the headspace analysis of monoterpene hydrocarbons from conifer needles was examined. To this end, the influences of fiber coating thickness, exposure time, and exposure temperature on the enrichment of the different monoterpene hydrocarbons were investigated. The distribution constants between polydimethylsiloxane fiber and gas phase at a given temperature were found to be very different. A relation is therefore derived to calculate the distribution constants of substances not available from their Kováts retention indices. A slightly different approach could be the use of so-called “relative distribution factors”, not considering the actual volume of fiber coating. In view of the different enrichment conditions in SPME as well as the general problems of headspace analysis, a comparison with a completely different method of sample preparation is presented. Furthermore, some applications of SPME to the analysis of monoterpenes from pine needles are given. 相似文献
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不同种兰花香气成分分析 总被引:1,自引:0,他引:1
利用固相微萃取和气相色谱-质谱联用(GC-MS)技术分析了5种兰花的香气成分。结果表明,5种兰花香气成分的种类和含量存在明显差异。绿苹果(Den.LittleGreen Apples)主要由反-2-己烯醛、己醛、丁羟甲苯、乙酸乙酯和3-己烯-1-醇等化合物构成,其中乙酸乙酯和反-2-己烯醛可能是花朵中苹果香的主要来源。香水文心兰(Onc.Sharry Baby)的主要香气化合物是顺-3,7-二甲基-1,3,6-辛三烯、3,7-二甲基-2,6-辛二烯-1-醇和3,7-二甲基-1,6-辛二烯-3-醇,三者的相对含量总和为84.57%。台北小姐(Cym.Miss Taipei)香气成分的主要特征不明显,除4-甲基苯酚和2-乙基丁醛外,其他化合物的相对含量均低于5%。夕阳红(Phal.Taida Salu)有香气成分50种,相对含量为87.01%,主要成分为柯巴烯、正己烷、甲酸己酯和3-己烯-1-醇。绿世界(Blc.Sung Ya Green‘green world’)有香气成分37种,主要由丙基环丙烷、2-(4-甲氧基苯基)乙醇、反-2-己烯-1-醇、3-己烯-1-醇、反-2-己烯醛、丁基呋喃和3,7,11-三甲基-1,6,10-十二碳三烯-3-醇等组成。 相似文献