为了优化青钱柳茶挥发性物质萃取的关键因素,进一步为其挥发性物质鉴定提供合适的理论方法,本研究采用顶空固相微萃取法(SPME)对青钱柳茶叶中的挥发性物质进行萃取,并用气相色谱高通量飞行时间质谱(Gas chromatograph high flux time of...为了优化青钱柳茶挥发性物质萃取的关键因素,进一步为其挥发性物质鉴定提供合适的理论方法,本研究采用顶空固相微萃取法(SPME)对青钱柳茶叶中的挥发性物质进行萃取,并用气相色谱高通量飞行时间质谱(Gas chromatograph high flux time of flight mass spectrometer, GC-TOF-MS)技术对其进行分析。通过设计不同的萃取头、萃取温度、萃取时间,以及不同料液比进行萃取实验,以确定HS-SPME的最佳条件。结果表明:选取75μm CAR/PDMS的萃取头,在萃取温度为80℃、料液比为1:15的条件下萃取60 min为最优萃取条件。在此条件下,共检测出青钱柳茶叶229种挥发性物质,包括酸类、醛类、酮类、醇类、酯类、烷烃类、烯烃类及杂环类化合物。其中,醛类、杂环类和醇类化合物的相对含量较高,相对含量排在前五位的分别为己醛、1-石竹烯、正己醇、2-甲基丙烯醛、2-己烯醛。展开更多
The aroma property and nutraceutical capacity are two crucial characteristics for the acceptance of edible flowers.The volatile profile of the Chinese milk vetch flowers(CMVF)was investigated using HS-SPME-GC×GC-...The aroma property and nutraceutical capacity are two crucial characteristics for the acceptance of edible flowers.The volatile profile of the Chinese milk vetch flowers(CMVF)was investigated using HS-SPME-GC×GC-TOF-MS for the first time.A total of 279 compounds were identified by the two-dimensional gas chromatography technology,including 46 alcohols,45 aldehydes,54 esters,39 ketones,66 hydrocarbons,9 phenols,and 20 other compounds,with pentadecanal(14.35%)revealed to be the major volatile component.Meanwhile,The five CMVF extracts were evaluated for their phytochemical composition and biological activity.The antioxidant activity assay indicated that the ethanol extract of CMVF revealed the highest scavenging capacity against DPPH radicals with IC_(50) of 384μg/mL,the ethyl acetate extracts of CMVF revealed the strongest scavenging capacity against ABTS⋅^(+)(IC_(50)=140.83μg/mL)and⋅OH(IC_(50)=14.25μg/mL).In addition,the water extracts of CMVF inhibited tyrosinase activity through mixed type and the alcohol extracts of CMVF inhibited elastase activity through competitive type.The Pearson correlation analysis showed that the bioactivity of the CMVF extracts were significantly impacted by TPC(total phenolic content)and TFC(total flavonoids content).These results suggested that CMVF extracts exhibited great potential for functional foods and cosmetics utilization due to its promising nutraceutical and nutricosmetic properties.展开更多
为比较超声辅助水蒸气蒸馏法与传统水蒸气蒸馏法所提白胡椒精油在挥发性成分上的差异,本研究采用上述两种方法制备精油。继而结合溶剂萃取(Liquid-Liquid Extraction,LLE),采用全二维气相色谱-嗅闻-飞行时间质谱联用技术(Comprehensive ...为比较超声辅助水蒸气蒸馏法与传统水蒸气蒸馏法所提白胡椒精油在挥发性成分上的差异,本研究采用上述两种方法制备精油。继而结合溶剂萃取(Liquid-Liquid Extraction,LLE),采用全二维气相色谱-嗅闻-飞行时间质谱联用技术(Comprehensive Two-Dimensional Gas Chromatography Olfactometry Time of Flight Mass Spectrometry,GC×GC-O-TOF-MS)对样品进行了全面解析。采用香气提取物稀释分析法(Aroma Extraction Dilution Analysis,AEDA),筛选稀释因子(Flavor Dilution,FD)≥32的香气活性化合物进行精确定量,计算其气味活性值(Odor Activity Value,OAV)。结果表明,两种白胡椒精油共鉴定出109种挥发性成分,其中有49种萜烯类,27种醇类,12种酮类,7种醛类,5种酯类和9种其它类化合物。通过对比两种白胡椒精油挥发性成分的种类和浓度,发现超声辅助水蒸气蒸馏法不仅具有较高的精油提取率,且对萜烯类化合物的提取效率优势显著。从两种白胡椒精油中嗅闻到41种香气活性化合物的气味,OAV结果发现,超声辅助提取法制得的白胡椒精油中3-蒈烯、月桂烯、α-松油烯、(+)-柠檬烯、对伞花烃、E-石竹烯、芳樟醇、4-萜烯醇等重要的香气活性化合物的OAV均得到了提升,可见超声辅助在提高胡椒精油提取率的同时,还有效促进了胡椒精油中香气活性化合物的释放,研究为改善水蒸气蒸馏提取植物精油的风味品质提供了一种方法和思路。展开更多
文摘为了优化青钱柳茶挥发性物质萃取的关键因素,进一步为其挥发性物质鉴定提供合适的理论方法,本研究采用顶空固相微萃取法(SPME)对青钱柳茶叶中的挥发性物质进行萃取,并用气相色谱高通量飞行时间质谱(Gas chromatograph high flux time of flight mass spectrometer, GC-TOF-MS)技术对其进行分析。通过设计不同的萃取头、萃取温度、萃取时间,以及不同料液比进行萃取实验,以确定HS-SPME的最佳条件。结果表明:选取75μm CAR/PDMS的萃取头,在萃取温度为80℃、料液比为1:15的条件下萃取60 min为最优萃取条件。在此条件下,共检测出青钱柳茶叶229种挥发性物质,包括酸类、醛类、酮类、醇类、酯类、烷烃类、烯烃类及杂环类化合物。其中,醛类、杂环类和醇类化合物的相对含量较高,相对含量排在前五位的分别为己醛、1-石竹烯、正己醇、2-甲基丙烯醛、2-己烯醛。
基金supported by the National Natural Science Foundation of China(No.32102123)the major project on natural science of Anhui Provincial Department of higher education(2023AH040323)+2 种基金the major project of science research of Wuhu Institute of Technology(wzyzrzd202303)the training program of excellent and top talents of Anhui Provincial Department of Higher Education(gxgnfx2022133)partially supported by the Research Project of China Tobacco Anhui Industrial Co.,Ltd.(No.2023130).
文摘The aroma property and nutraceutical capacity are two crucial characteristics for the acceptance of edible flowers.The volatile profile of the Chinese milk vetch flowers(CMVF)was investigated using HS-SPME-GC×GC-TOF-MS for the first time.A total of 279 compounds were identified by the two-dimensional gas chromatography technology,including 46 alcohols,45 aldehydes,54 esters,39 ketones,66 hydrocarbons,9 phenols,and 20 other compounds,with pentadecanal(14.35%)revealed to be the major volatile component.Meanwhile,The five CMVF extracts were evaluated for their phytochemical composition and biological activity.The antioxidant activity assay indicated that the ethanol extract of CMVF revealed the highest scavenging capacity against DPPH radicals with IC_(50) of 384μg/mL,the ethyl acetate extracts of CMVF revealed the strongest scavenging capacity against ABTS⋅^(+)(IC_(50)=140.83μg/mL)and⋅OH(IC_(50)=14.25μg/mL).In addition,the water extracts of CMVF inhibited tyrosinase activity through mixed type and the alcohol extracts of CMVF inhibited elastase activity through competitive type.The Pearson correlation analysis showed that the bioactivity of the CMVF extracts were significantly impacted by TPC(total phenolic content)and TFC(total flavonoids content).These results suggested that CMVF extracts exhibited great potential for functional foods and cosmetics utilization due to its promising nutraceutical and nutricosmetic properties.
文摘为比较超声辅助水蒸气蒸馏法与传统水蒸气蒸馏法所提白胡椒精油在挥发性成分上的差异,本研究采用上述两种方法制备精油。继而结合溶剂萃取(Liquid-Liquid Extraction,LLE),采用全二维气相色谱-嗅闻-飞行时间质谱联用技术(Comprehensive Two-Dimensional Gas Chromatography Olfactometry Time of Flight Mass Spectrometry,GC×GC-O-TOF-MS)对样品进行了全面解析。采用香气提取物稀释分析法(Aroma Extraction Dilution Analysis,AEDA),筛选稀释因子(Flavor Dilution,FD)≥32的香气活性化合物进行精确定量,计算其气味活性值(Odor Activity Value,OAV)。结果表明,两种白胡椒精油共鉴定出109种挥发性成分,其中有49种萜烯类,27种醇类,12种酮类,7种醛类,5种酯类和9种其它类化合物。通过对比两种白胡椒精油挥发性成分的种类和浓度,发现超声辅助水蒸气蒸馏法不仅具有较高的精油提取率,且对萜烯类化合物的提取效率优势显著。从两种白胡椒精油中嗅闻到41种香气活性化合物的气味,OAV结果发现,超声辅助提取法制得的白胡椒精油中3-蒈烯、月桂烯、α-松油烯、(+)-柠檬烯、对伞花烃、E-石竹烯、芳樟醇、4-萜烯醇等重要的香气活性化合物的OAV均得到了提升,可见超声辅助在提高胡椒精油提取率的同时,还有效促进了胡椒精油中香气活性化合物的释放,研究为改善水蒸气蒸馏提取植物精油的风味品质提供了一种方法和思路。
