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.     

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.     

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.     

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.     

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%).     

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.     

Comparative analysis of chemical components between barks and leaves of Eucommia ulmoides Oliver

The chemical components of the essential oils in the barks and leaves of Eucommia ulmoides Oliver were analyzed and compared by chromatograms and mass spectra technique, heuristic evolving latent projections (HELP), alternative moving window factor analysis (AMWFA) algorithms and normalization method based on the peak areas; the flavones in the barks and leaves of Eucommia ulmoides Oliver were separated on an ODS column by gradient elution carried out with the flow phase consisting of water, methanol and phosphoric acid (0.1%), and their contents were quantitatively determined by standard curve method and diode array detection (DAD) at 362 nm. The results show that 68 and 73 compounds respectively from essential oils of the barks and leaves of Eucommia ulmoides Oliver are identified, and there are 33 mutual compounds among 108 compounds determined. The total contents of these volatile components of the two samples possess 92.9% and 97.75% of the gross of the relevant essential oils, respectively; the contents of the rutin, quercetin and kaempferol in the barks and leaves of Eucommia ulmoides Oliver are 0.016 9, 0.003 6, 0.002 1 and 0.064 4, 0.030 2, 0.010 0 mg/g, respectively, and the determination recoveries are 95.2%–106.2%. The comparative analysis shows that for the barks and leaves of Eucommia ulmoides Oliver, there are significant differences in their components of the relevant essential oils and flavones. Foundation item: Project(20235020) supported by the National Natural Science Foundation of China     

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%.     

鸦胆子的油脂品质分析

本文分析了鸦胆子的主要组份和鸦胆子仁油的一些主要理化指标,测定结果表明鸦胆子粗脂肪的平均含量为20.5%(干基),鸦胆子仁油的粗脂肪含量高达56.9%.鸦胆子的粗蛋白含量为4.4%(鸦胆子仁的粗蛋白含量为1.6%).鸦胆子仁油的一些理化指标皂化值为198.0,碘值为98.3,不皂化物0.75%.经气相色谱分析,鸦胆子仁油主要由棕榈酸、硬脂酸、油酸、亚油酸和亚麻酸构成.其中油酸含量达到63.3%,亚油酸为21.2%.因此,鸦胆子仁油很可能是一种有开发价值的野生新油源.     

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。     

餐饮源挥发性有机物(VOCs)排放特征及对臭氧生成的影响

餐饮排放是城市地区挥发性有机物（VOCs）重要的无组织来源，由于其排放特征复杂，是大气环境研究和管理的薄弱环节.本研究采用了现场和实验模拟两种采样方式，利用2，4-二硝基苯肼（DNPH）采样柱和不锈钢罐分别采集羰基化合物和全空气样品，然后利用高效液相色谱（HPLC）和气相色谱-质谱联用仪（GC-MS/FID）对116种组分进行定性定量分析.在此基础上，分析了餐饮源VOCs的排放特征及其影响因素.总体来看，含氧有机物（OVOCs）和烷烃是VOCs浓度的主要贡献者，但不同餐饮源的源谱特征差异较大.另外，通过比较发现食用油的种类、油的使用次数、加热方式、烹饪方式和调味料等因素会对餐饮源VOCs排放特征造成显著影响.进一步分析了不同菜系所排放VOCs的臭氧生成潜势（OFP），关键组分主要是甲醛、乙醛、丁烯醛、乙烯和丙烯等.本研究成果能够补充我国餐饮源VOCs控制所需的基础数据.     

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．     

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.     

Rheological characteristics of drug-loaded microemulsions and their printability in three dimensional printing systems

Rheological properties of microemulsions(MEs) and their printability in three dimensional printing(3DP) systems were investigated.A series of MEs with different contents of oil phase were prepared using sonication method with ibuprofen as model drug and soybean lecithin as emulfier.Stationary and transient rheological properties of MEs were investigated by ARES-SRF using concentric cylinders measuring systems.3DP systems with piezoelectric drop-on-demand print heads were employed to test the printability of the MEs.Results demonstrate that the apparent viscosity and dynamic linear viscoelastic regions of the MEs are the most important parameters for continuous and stable printing of MEs by 3DP.The incorporation of drug in the MEs has little influence on the MEs’ stationary rheological behaviors and dynamic viscoelasticity,but the concentration of oil phase has a strong influence on them.The rheological property of binder liquids has a close relationship with their printability in 3DP system.     

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.     

花椒乙醚萃取物的成分分析

测定了花椒乙醚萃取物中挥发油的含量，并用色谱－质谱联用仪分析了化学成分及百分含量。从中分离出近８０种化合物，初步鉴定出２６种，占挥发油总量的７５．５５％，其中２４种为萜类化合物，杀虫活性组分β－水芹烯含量最高，达１２．９７％，里哪醇含量为２．０９％。     

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。     

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.