共查询到19条相似文献,搜索用时 125 毫秒
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气相色谱-质谱联用法测定黄兰中挥发油化学成分 总被引:2,自引:0,他引:2
采用水蒸气蒸馏法、超临界萃取法、微波辅助提取法与超声波辅助萃取法等4种提取方法提取黄兰挥发油,运用毛细管气相色谱-质谱联用法结合计算机检索对其挥发油化学成分作了鉴定和测定.结果显示从水蒸气蒸馏法、超临界萃取法、微波辅助提取法与超声波辅助萃取法所得挥发油中分别鉴定出了36,35,25和26种化合物.用面积归一法测定了4种挥发油中各种化学成分的相对百分含量,各占总峰面积的92.62%,91.46%,93.18%和95.53%.虽然不同提取方法所得的4种挥发油化学成分有所不同,但其中有20种化合物包括β-荜澄茄烯、大根香叶烯D、丁香烯氧化物、丁香烯等为4种挥发油提取物所共有. 相似文献
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茵陈挥发油的超临界CO2萃取法与水蒸气蒸馏法提取的比较 总被引:10,自引:0,他引:10
采用超临界CO2萃取法与水蒸气蒸馏法从菌陈中提取挥发油,用GC-MS法测定其化学成分和相对含量,对两种提取方法所得的挥发油进行比较,水蒸气蒸馏法提取菌陈挥发油的产率为0.03%(w),主要成分为匙叶桉油烯醇、吉玛烯D、反式-石竹烯、2,4-戊二炔苯、β-金石欢烯等;超临界CO2萃取法提取的产率为0.15%(w),主要成分为百里酚、β-红没药烯、2-异丙基-4-甲基-1-甲氧基苯、异百里酚、2-特丁基-4-(2,4,4-三甲基戊基)苯酚、β-杜松烯等。 相似文献
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超临界CO2流体萃取法与水蒸气蒸馏法提取荆芥穗挥发油化学成分的研究 总被引:6,自引:0,他引:6
采用超临界CO2萃取法(SFE)与水蒸气蒸馏法(SD)从荆芥穗中提取挥发油。采用SE-54毛细管柱进行分析,用气相色谱-质谱法对挥发油中各种化学成分进行鉴定,用归一化法测定各组分的含量。色谱条件:SE-54毛细管柱 (30 m×0.25 mm i.d.,0.25 μm),柱温50 ℃(3 min)5 ℃/min180 ℃(2 min)10 ℃/min260 ℃(50 min);分流进样,分流比1∶50;进样口温度280 ℃。在采用超临界CO2萃取法提取的挥发油中共鉴定出54种成分,其主要成分为长叶薄荷酮、薄荷酮、亚油酸氯化物等;在水蒸气蒸馏法提取的挥发油中共鉴定出39种成分,其主要成分为长叶薄荷酮、薄荷酮、柠檬烯等。超临界法较水蒸气法更加稳定可靠,重现性好,适用于中药挥发油的化学成分分析。 相似文献
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薤白挥发油成分的超临界CO2萃取及GC-MS分析 总被引:3,自引:0,他引:3
采取超临界CO2萃取和水蒸气蒸馏两种方法提取薤白中的挥发油,比较了两种提取方法得到的挥发油的理化性质,并利用GC-MS对它们进行了定性、定量分析。两种方法的主要提取物均为含硫化合物,但超临界CO2萃取法得到的含硫化合物的数量和质量都高于水蒸气蒸馏法得到的提取物。采用水蒸气蒸馏法提取8 h得到的萃取率为1.72%。通过设计的超临界CO2萃取的正交实验,得到了最佳萃取工艺条件为:压力25 MPa,温度40℃,CO2流量为25L/h。最佳萃取时间为120 min,萃取率为4.41%,是水蒸气蒸馏法萃取率的2.8倍。实验结果表明,超临界CO2萃取法简单易行,可以较快速、有效地提取薤白中的挥发油。 相似文献
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蒸馏-萃取法与溶剂萃取法提取杏果实香气成分的比较 总被引:8,自引:0,他引:8
采用水蒸气蒸馏一萃取法和溶剂萃取法提取杏果香成分,用气相色谱一质谱联用测定其化学成分和质量分数,并对两种提取方法进行了比较。水蒸气蒸馏一萃取法提取的杏果香成分是74种,占总峰面积的73.604%;溶剂萃取法提取的杏果香成分是32种,占总峰面积的44.677%,两者相同的成分有21种。溶剂萃取法提取的主要是烷烃类化合物,水蒸气蒸馏萃取法提取的主要化合物为G醛类、C6醇类、内酯类、萜烯醇类、酮类、烷烃类等。结果表明:水蒸气蒸馏-萃取法能较好地提取杏果实香气成分。 相似文献
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GC-MS of volatile components of Schisandra chinensis obtained by supercritical fluid and conventional extraction 总被引:1,自引:0,他引:1
In this paper, the volatile compounds of Schisandra chinensis obtained by different extraction techniques including supercritical fluid extraction (SFE), steam distillation (SD), Soxhlet extraction (SE) and ultrasound-assisted extraction (UAE) were investigated for the first time. The sample preparation procedure for GC-MS analysis of the volatile compounds was optimized and then 37, 45, 27 and 37 compounds were identified in the samples obtained by SFE, SD, SE and UAE methods, respectively. As the therapeutic effect of the traditional Chinese medicine is usually based on multifarious essential components or the combination of them instead of only one component, the volatile compounds were compared in groups with the extracts by SE, SD and UAE. This would be more reasonable to evaluate the effects of an alternative technique to extracting multifarious essential components. Among the identified components in the SFE extract, 32 compounds were the same as that by three conventional methods, accounting for 90.5% of the volatile compounds identified. However, as the volatile compounds were classed into groups, it was easy to see that the Schisandra chinensis oil extracted by SFE was made up largely of aromatics and sesquiterpenoids (52.1 and 27.6%, respectively), with less amounts of monoterpenoids and other compounds, distinguishing SFE from the conventional extractions. 相似文献
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党丽娟 《广东微量元素科学》2006,13(5):56-58
为鉴定紫茉莉根挥发油的化学成分,按2000年版中国药典规定的方法提取挥发油,采用气相色谱-质谱联用仪分析了紫茉莉根挥发油的化学成分。结果表明,从紫茉莉根中提得0.12%的挥发油,鉴定了其中23种化合物,这些成分均为首次从紫茉莉根中分离鉴定,为进一步研究紫茉莉根的化学成分提供有益的补充。 相似文献
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山苍子雄花和雌花挥发油的提取及成分分析 总被引:3,自引:0,他引:3
山苍子的根、叶和果实中均含有精油,山苍子油的主要成分为柠檬醛。采用水蒸汽蒸馏法提取山苍子花挥发油,对雄花和雌花分别提取。并利用GC-MS气质联用仪对两组挥发油进行分析检测,确定其化学成分及相对百分含量。从雄花挥发油中鉴定出43种成分(占挥发油总含量的88.15%),从雌花挥发油中鉴定出30种成分(占挥发油总量的85.53%)。 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