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香樟木质部挥发性成分的SPME-GC/MS分析 总被引:1,自引:0,他引:1
采用固相微萃取技术(SPME)吸附香樟木质部挥发性成分,结合气相色谱-质谱(GC/MS)进行化学成分的分离和鉴定,同时比较不同色谱柱对分离效果的影响。结果表明:采用弱极性DB-5MS色谱柱共分离出51个组分,解析出43种挥发性成分,占总峰面积的97.04%,分离效果和所得的峰形较好于DB-WAXetr色谱柱。鉴定出含量较高的成分有:左旋-α-蒎烯(4.57%)、莰烯(2.14%),双环[3.1.0]-4-甲基-1-异丙基-2-己烯(4.16%)、β-蒎烯(2.3%)、邻异丙基甲苯(2.15%)、D-柠檬烯(7.49%)、桉叶油醇(13.85%)、樟脑(38.71%)、(R)-4-萜品醇(1.74%)、α-松油醇(2.40%)、黄樟素(2.96%)、α-荜澄茄油烯(4.36%)、1-石竹烯(1.92%)等。该方法可为香樟材在医药、食品和化学工业等方面的进一步开发和利用提供参考。 相似文献
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薰衣草化学成分分析及差异标志物的识别 总被引:2,自引:0,他引:2
采用顶空固相微萃取-气相色谱-质谱(HS-SPME-GC/MS)联用技术,结合保留指数(RI),建立了新疆不同品种薰衣草化学成分的快速分析方法,并采用多元统计分析方法对不同品种薰衣草的特征差异性标志物进行识别。选取薰衣草挥发性化合物中顺-β-罗勒烯、芳樟醇、乙酸芳樟酯、萜品烯-4-醇、石竹烯和石竹烯氧化物等6个代表性成分进行方法考察,首先优化HS-SPME萃取条件,然后运用GC/MS法分析3个品种26批薰衣草花中挥发性成分,最后采用主成分分析(PCA)和偏最小二乘-判别分析(PLS-DA)对数据进行处理。结果显示:3个不同品种薰衣草样品间的化学成分得到有效区分;筛选识别出9个不同品种薰衣草间差异显著的化学成分标志物,薰衣草特征变量组分与差异标志物分析结果一致。这说明,SPME-GC/MS结合多元统计技术可以为薰衣草复杂体系的快速鉴定、差异标志物识别提供可行的方法参考。 相似文献
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气相色谱-质谱法分析含羞草挥发油的化学成分 总被引:4,自引:0,他引:4
采用常规水蒸气蒸馏法提取含羞草中的挥发油,并用气相色谱-质谱法分析其化学成分。分离出41个峰,鉴定出34种化学成分,占总峰面积的89.01 %。含羞草挥发油中主要成分为N,N-二苯基-肼酰胺、邻苯二甲酸二异丁酯、邻苯二甲酸丁基-2-甲基丙基酯、十九烷、1H-吲哚-3-乙醇、二十四烷、2,4-二(1-苯乙基)苯酚、二十六烷、二十七烷等。 相似文献
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The headspace constituents released from fresh flowers of lilium. spp were sampled by solid phase microextraction(SPME). The chemical constituents were separated and identified by gas chromatography-mass spectrometry. Linalol(59.64%), trans-ocimene(30.35%), benzene, 1,4-dimethoxy(2.03%), benzoic acid, methyl ester(1.69%), phenol, 2-methoxy-4-(1-propenyl), (E)-(1.69%),β-pinene(1.56%) were the most abundant volatiles released from fresh flowers of lilium. spp and a total of 23 volatile compounds were identified in this study. The results demonstrated that headspace SPME-GC/MS is a simple, rapid and solvent free method suitable for analysis of volatile compounds emitted from fresh flowers of lilium. spp. 相似文献
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ABSTRACT An on-line thermogravimetry/gas chromatography/mass spectrometry (TG/GC/MS) system has been constructed through additions to and appropriate modifications of commercially available instruments. The system employed a Du Pont 951 thermogravimetric analyzer coupled to a Hewlett-Packard 5890 gas chromatograph/5970 mass selective detector system. A nickel tube, inserted directly into the area immediately above the TG sample pan, acted as a transfer line. An adsorbent trap with a heater and a heated six-way valve was installed between the TG and the GC. The volatile compounds generated from selected materials in the TG were adsorbed by the trap. After the heating and purging process, the trap was rapidly heated and the volatile compounds in the trap were swept into the GC injector and were then analyzed by GC/MS. The on-line TG/GC/MS system was examined by using selected natural products. A number of volatile compounds were generated from the samples by TG, separated by GC and identified by MS. The stability, the weight loss, and the evolution of compounds from the materials could be analyzed and studied. 相似文献
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气相色谱-质谱法分析芫荽籽挥发油化学成分 总被引:1,自引:0,他引:1
采用水蒸气蒸馏法从新疆产芫荽籽中提取挥发油,收率w=0.78%。用HP-5色谱柱(30m×0.32mm×0.25μm),氢火焰离子化检测器(FID),选取最佳实验条件,用峰面积归一化法测定其相对含量,并用气相色谱-质谱法(GC/MS)对化学成分进行鉴定。共分离出27个峰,鉴定了21个成分,相对含量占挥发油的99.84%。主要成分为脂肪烃、单萜以及它们的含氧衍生物,其中含量较高的有芳樟醇、内-龙脑、α-葑烯、1-甲基-5-异丙烯基-环己烯和(Z)-2,7-二甲基-5-炔-3-辛烯。本方法稳定可靠。 相似文献
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气相色谱-质谱法分析冠心苏合丸中挥发性组分 总被引:2,自引:0,他引:2
采用了水蒸气蒸馏萃取法提取冠心苏合丸中的挥发性组分,测得冠心苏合丸中的挥发性组分含量为w=11%。利用气相色谱质谱法(GC/MS)对所获得的挥发性组分进行分析,通过G1701BA化学工作站检索NIST98谱图库,并结合标准谱图库和有关文献,从冠心苏合丸中的挥发性组分中确定出19种化学成分,占冠心苏合丸中挥发性组分总检出量的95.89%。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性组分中的相对含量。主要挥发性组分是冰片、异冰片和苯甲酸苄酯。并采用气相色谱法对冠心苏合丸中冰片的含量进行了测定。结果表明:冰片质量浓度在1.0~5.0g/L范围内与冰片对内标物的色谱峰面积比值成良好的线性关系,冰片的平均回收率为98%~106%。 相似文献