Analysis of volatile components in herbal pair herba schizonepetae-ramulus cinnamomi

Analysis of volatile components in herbal pair （HP） herba schizonepetae-ramulus cinnamomi （HS-RC）, single herb HS and RC was carried out by gas chromatography-mass spectrometry （GC-MS） data and chemometric resolution method （CRM）. The two-dimensional data obtained from GC-MS instruments were resolved into a pure chromatogram and a mass spectrum of each chemical compound by CRM. In total, 47, 61 and 51 chemical components in volatile oil of HS, RC, and HP HS-RC were respectively determined qualitatively and quantitatively, accounting for 90.52%, 88.37%, and 88.72% total contents of volatile oil of HS, RC, and HP HS-RC, respectively. The number of the volatile components of HP HS-RC is almost the addition of that of two single herbs, but their relative contents are changed.     

Chemical component analysis of volatile oil in drug pair Herba Ephedrae-Ramulus Cinnamomi by GC-MS and CRM

Active volatile components in drug pair(DP)Herba Ephedrae-Ramulus Cinnamomi(HE-RC),single drug HE and RC were analyzed by gas chromatography/mass spectrometry(GC/MS),chemometric resolution method(CRM)and overall volume integration.By means of CRM,the two-dimensional data obtained from GC-MS instruments were resolved into a pure chromatogram and a mass spectrum of each chemical compound.In total,97,62,and 78 volatile chemical components in volatile oil of HE,RC,and DP HE-RC,were respectively determined qualitatively and quantitatively,accounting for 90.08%,91.62%,and 89.76% total contents of volatile oil of HE,RC,and DP HE-RC respectively.It is further demonstrated that the numbers of volatile components of DP HE-RC are almost the sum of those of two single drugs,but some relative contents of them are changed.Some new components,such as 1,6-dimethylhepta-1,3,5-triene,tetracyclo[4.2.1.1(2,5).0(9,10)]deca-3,7-diene,globulol and(E,E)-6,10,14-trimethyl-5,9,13-pentadecatrien-2-one are found in DP HE-RC because of chemical reactions and physical changes during decoction.     

Comparative analysis of volatile constituents between herbal pair flos lonicerae-caulis lonicerae and its single herbs

Gas chromatography-mass spectrometry (GC-MS) and the chemometric resolution method (alternative moving window factor analysis, AMWFA) were used for comparative analysis of volatile constituents in herbal pair (HP) flos lonicerae-caulis lonicerae (FL-CL) and its single herbs. The temperature-programmed retention index (PTRI) was also employed for the identification of compounds. In total, 44, 39, and 50 volatile chemical components in volatile oil of FL, CL and HP FL-CL were separately determined qualitatively and quantitatively, accounting for 87.22%, 94.54% and 90.08% total contents of volatile oil of FL, CL and HP FL-CL, respectively. The results show that there are 32 common volatile constituents between HP FL-CL and single herb FL, 33 common volatile constituents between HP FL-CL and single herb CL, and 10 new constituents in the volatile oil of HP FL-CL.     

Comparative analysis of volatile constituents between herbal pair flos lonicerae-caulis lonicerae and its single herbs

Gas chromatography-mass spectrometry(GC-MS) and the chemometric resolution method(alternative moving window factor analysis,AMWFA) were used for comparative analysis of volatile constituents in herbal pair(HP) flos lonicerae-caulis lonicerae(FL-CL) and its single herbs.The temperature-programmed retention index(PTRI) was also employed for the identification of compounds.In total,44,39,and 50 volatile chemical components in volatile oil of FL,CL and HP FL-CL were separately determined qualitatively and quantitatively,accounting for 87.22%,94.54% and 90.08% total contents of volatile oil of FL,CL and HP FL-CL,respectively.The results show that there are 32 common volatile constituents between HP FL-CL and single herb FL,33 common volatile constituents between HP FL-CL and single herb CL,and 10 new constituents in the volatile oil of HP FL-CL.     

运用气相色谱-质谱(GC-MS)联用法对牛至挥发油化学成分的分析

牛至挥发油因具有镇痛、抗菌、抗病毒等作用,在临床上用于预防流感、治疗黄疸等疾病.采用超临界CO2技术萃取牛至挥发油,并用GC-MS分析其化学组成,共确定46组分,占总含量的90.347%,其中包括酸、酯、烯、酚、炔、醇等多种化合物,含量最多有麝香草酚(14.109%)和1-甲基-2-异丙基-苯(14.610%).     

Chemical component and antimicrobial activity of volatile oil of Calycopteris floribunda

The volatile oil of leaves and barks of Calycopteris floribunda was examined by gas chromatography-mass spectrometry (GC-MS). 52 volatile chemical components in leaves were identified. The antimicrobial assay of oils in the leaves and barks was carried out by disk diffusion method in vitro. The major components (mass fraction) in leaves are caryophyllene oxide (13.79%), n-hexadecanoic acid (11.91%) and β-caryophyllene (10.45%). Ten constituents are identified accounting for about 99.98% of the total volatile oil in the bark. Among these components, n-hexadecanoic acid (59.18%), linolic acid (12.70%) and butyl octyl phthalate (8.21%) are the major constituents. The oils exhibit strong antimicrobial activity and display more potent against bacteria than fungi.     

野菊菊米和野菊花挥发油化学成分的比较研究

采用水蒸气蒸馏法提取云南产野菊菊米和野菊花挥发油，用气相色谱-质谱联用技术对其化学成分进行分离鉴定，并用面积归一化法测定了相对含量．鉴定出野菊菊米主要化学成分50种，占总化合物的95．00％；野菊花主要化学成分42种，占总化合物的90．95％．野菊菊米和野菊花挥发油的主要成分为单萜烯类、倍半萜烯类及其含氧衍生物等，但其化学成分种类和含量有明显的差别．     

不同部位北香薷挥发油的制备及化学成分分析

目的：研究花、茎、叶不同部位北香薷挥发油的制备及化学成分分析。方法：采用水蒸气蒸馏法制备挥发油,运用气相色谱-质谱(GC-MS)技术鉴定香薷挥发油的化学成分,纸片法考察抑菌活性。结果：GC-MS分析鉴定出香薷花、茎、叶成分含量较高的分别为BETA-去氢香薷酮、1,1'-[亚乙基双(氧基)]二丁烷、BETA-去氢香薷酮,抑菌试验。结果表明北香薷三个部位对金黄色葡萄球菌、枯草和短小芽孢杆菌、白色念珠菌有不同程度抑制作用。结论：北香薷不同部位挥发油的化学成分不同、抑菌活性也有差异,本研究为北香薷挥发油的开发利用提供依据。     

我国不同地区蜂胶乙醇提取物化学成分的分析

采用气质联用仪对我国安徽、河南、江苏、山东、山西、四川、新疆7省区蜂胶中的主要成分进行分离鉴定,分离鉴定出黄酮、酚、醌、萜、甾类等14类79种物质其中黄酮、酚、醌、萜类物质含量较高．实验表明,不同产地蜂胶中挥发性物质的种类基本相似,但各种单一成分的相对含量存在较大差异;不同地区的蜂胶具有代表性的组分,可通过GC—MS方法检测不同蜂胶中的挥发物相对含量和不同地区蜂胶的特征代表物来鉴别蜂胶的产地．     

野生与家种缬草挥发油GC—MS分析

应用GC—MS分析对比研究了野生与人工栽培缬革的挥发油，分别鉴定出52个和45个化合物．2种缬草挥发油的主成分基本相同，含量稍有差异，其差异对其在医药工业上的应用没有影响．     

野生与家种缬草挥发油GC-MS分析

应用GC-MS分析对比研究了野生与人工栽培缬草的挥发油,分别鉴定出52个和45个化合物.2种缬草挥发油的主成分基本相同,含量稍有差异,其差异对其在医药工业上的应用没有影响.     

河北紫花苜蓿挥发油成分的GC-MS分析

采用水蒸气蒸馏法提取河北产9月份收割的紫花苜蓿干燥全草中的挥发油成分,并通过气相色谱-质谱联用技术（GC-MS）对其进行分析。利用GC-MS分离出152种成分,并鉴定了其中43种化合物,占挥发性物质的73.3%（质量分数,下同）,其中最多的是酸类化合物,占40.17%。该紫花苜蓿挥发油主要成分是十六烷酸（32.1%）、六氢金合欢基丙酮（8.83%）、植物醇（4.51%）,还有5,6,7,7-α-四氢-4,4,7-α-三甲基-2-（4 H）苯基呋喃（3.21%）、邻苯二甲酸二异丁基酯（2.94%）。通过与其他产地、不同收割期、不同处理方式的苜蓿挥发油成分进行比较,发现产地、收割期、处理方式不同的紫花苜蓿中挥发油成分差别显著,为进一步研究和利用苜蓿资源等提供借鉴作用。     

冠心丹参片中降香挥发油鉴别和成分分析

为对冠心丹参片中降香油进行定性分析及降香油主要化学成分的分析测定,用薄层色谱法进行定性鉴别,用气质联用技术分离和鉴定各化学组分,用离子流色谱峰面积归一法计算各化学组分的相对含量。结果显示,在薄层色谱鉴别显示冠心丹参片样品色谱中,与降香油对照品色谱相应的位置上显相同颜色的斑点。气质联用分析分离出25个化学组分峰,并鉴定其中10个化学成分和计算各组分的相对含量。由此得出,利用薄层色谱法和气质联用分析法可以有效鉴别冠心丹参片中降香挥发油的有效成分,主要有效成分为橙花叔醇,含量为42.01%.     

Analysis of volatile chemical components of Radix Paeoniae Rubra by gas chromatography-mass spectrometry and chemometric resolution

The volatile chemical components of Radix Paeoniae Rubra (RPR) were analyzed by gas chromatography-mass spectrometry with the method of heuristic evolving latent projections and overall volume integration. The results show that 38 volatile chemical components of RPR are determined, accounting for 95.21% of total contents of volatile chemical components of RPR. The main volatile chemical components of RPR are (Z, Z)-9,12-octadecadienoic acid, n-hexadecanoic acid, 2-hydroxy- benzaldehyde, 1-(2-hydroxy-4-methoxyphenyl)-ethanone, 6,6-dimethyl-bicyclo[3.1.1] heptane-2-methanol, 4,7-dimethyl-benzofuran, 4-(1-methylethenyl)-1-cyclohexene-1-carboxaldehyde, and cyclohexadecane.     

Determination of volatile components in cut tobacco with gas chromatography-mass spectrometry and chemometric resolution

Chromatography-mass spectrometry(GC-MS)was used to analyze the volatile components of cut tobacco samples with the help of heuristic evolving latent projections(HELP).After extracting with simultaneous distillation and extraction method,the volatile components in cut tobacco were detected by GC-MS.Then the obtained original two-dimensional data were resolved into pure mass spectra and chromatograms.The qualitative analysis was performed by similarity searches in the national institute of standards and technology(NIST)mass database with the obtained pure mass spectrum of each component and the quantitative results were obtained by calculating the volume of total two-way response.The accuracy of qualitative and quantitative results were greatly improved by using the two-dimensional comprehensive information of chromatograms and mass spectra.107 of 141 separated constituents in the total ion chromatogram of the volatile components were identified and quantified,accounting for about 88.01% of the total content.The result proves that the developed method is powerful for the analysis of complex cut tobacco samples.     

大花序桉叶精油的化学成分分析

采用水蒸汽蒸馏法提取大花序桉叶精油,通过气相色谱-质谱(GC-MS)联用分析鉴定其化学成分.首次从大花序桉叶精油中鉴定出34种化合物,鉴定精油成分占总精油质量分数的68.321%.大花序桉精油的主要成分是α-蒎烯(47.364%)、β-桉叶醇(2.457%)、γ-桉叶醇(1.955%)、α-桉叶醇(1.316%)和柠檬烯(1.427%),具有重要的工业应用价值.     

云南松花苞挥发性成分分析

采用氯仿提取云南松花苞中的化学成分,经GC/MS分析,从云南松花苞挥发油中分析鉴定出了49个挥发性成分,占峰面积的58.89%。化合物类型包括单萜、倍半萜、二萜、脂肪族和酚类化合物,其中二萜和单萜为主要成分;质量分数最高的是松香酸(18.91%),其次为脱氢松香酸(10.20%)和十二氢化-1,4a-二甲基-7-(1-甲基乙基)-1-菲甲酸(10.20%)。     

GC-MS结合直观推导式演进特征投影法（HELP）分析大茴香和小茴香挥发性化学成分

采用GC-MS联用技术结合直观推导式演进特征投影法（HELP）对大茴香和小茴香挥发性化学成分进行比较分析.此外,程序升温保留指数用来辅助定性.共定性出17种挥发性化学成分,其中大茴香13种,小茴香11种,分别占二者挥发油总相对含量的89.43%和99.53%.共有组分7种.大茴香和小茴香的挥发油主要成分为茴香烯,含量分别为70.72%和85.82%.     

两种木犀科植物挥发性成分GC-MS分析

研究了木犀科两种不同属植物挥发物组成和相对含量,采用气相色谱-质谱(GC-MS)联用技术分析了紫丁香叶和迎春花叶的挥发性成分.结果表明:两种植物挥发油共有成分9种,包括青叶醇、5-乙烯基-2-降冰片烯、乙酸叶醇酯、芳樟醇、脱氢二氢-β-紫罗兰酮、檀香醇、3-十四烯、匙叶桉油烯醇、α-香柠檬醇,各占总相对含量的68.74%和80.0%.     

不同地区烟叶中挥发性成分的分析

采用气流吹扫微注射器萃取技术联用GC-MS对不同地区烟叶中挥发性成分进行分析,并比较其含量.结果显示：烤烟和白肋烟中分别鉴定出67种和62种挥发性成分,其中以醇类和杂环化合物为主要成分.在不同地区相同品种、不同品种、同一品种不同部位烟叶的挥发性成分含量都具有显著的差别.所得结果能为研究烟草成分提供有利的参考依据.