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ANALYSIS OF VOLATILE CONSTITUENTS OF CHINESE MEDICINAL HERBS BY FLASH DISTILLATION/CAPILLARY GAS CHROMATOGRAPHY/MASS SPECTROMETRY
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《Chemical Research in Chinese Universities》 SCIE CAS 1986年第1期13-18,共6页
In present work,the volatile constituents of Curcuma longa L.,A.lancea (Thunb.) DC.,Foeniculum vulgare Mill,and Cinnamomun cassia Presl.have been analyzed by flash distillation/capillary gas chro-matography/mass spect... In present work,the volatile constituents of Curcuma longa L.,A.lancea (Thunb.) DC.,Foeniculum vulgare Mill,and Cinnamomun cassia Presl.have been analyzed by flash distillation/capillary gas chro-matography/mass spectrometry.The results are consistent with those obtained by conventional steam distillation extraction method.The optimum condition of flash distillation has been studied.The experimental results showed that this new technique proved to be a simple,rapid and efficient tool for microanalysis of volatile constituents of Chinese medicinal herbs. 展开更多
关键词 OC analysis OF VOLATILE CONSTITUENTS OF CHINESE MEDICINAL HERBS BY FLASH DISTILLATION/CAPILLARY gas chromatography/mass SPECTROMETRY gas
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Coupling a Gas Chromatography Unit to an Inductively Coupled Plasma Mass Spectrometer
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作者 Jerrad P. Auxier John D. Auxier II Howard L. Hall 《World Journal of Nuclear Science and Technology》 2017年第2期84-92,共9页
Although the eminent threat of a terrorist group detonating an improvised nuclear device (IND) in an urban environment is low, it is crucial that countries develop modern nuclear forensic capabilities to expedite resp... Although the eminent threat of a terrorist group detonating an improvised nuclear device (IND) in an urban environment is low, it is crucial that countries develop modern nuclear forensic capabilities to expedite response in a post-detonation scenario. In particular, new instruments need to be created to shorten dissolution time, expedite chemical separation, and improve forensic analysis of the nuclear melt glass that is created during the detonation of the device. To expedite this process, an instrument was designed to thermally couple a gas chromatograph (GC) to a time-of-flight inductively coupled plasma time-of-flight mass spectrometer (ICPTOFMS) In order to couple these two instruments, another instrument was designed to provide an isothermal atmosphere between the GC and TOFICPMS to expedite rapid gas separations processes. By using gas separations instead of the current wet chemistry processes, the required separation and analysis time of the melt glass significantly decreases. The new instrument would also provide a more detailed analysis of the elemental and isotopic composition of the melt glass. By completing these tasks simultaneously, this significantly decreases the required time to conduct these separations and improves the elemental and isotopic analysis. 展开更多
关键词 NUCLEAR FORENSICS gas chromatography mass SPECTROMETRY Melt Glass Chemical Separation NUCLEAR Security ELEMENTAL analysis
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Gas Chromatography–Mass Spectrometry for Quantitative and Qualitative Analysis of Essential Oil from Curcuma wenyujin Rhizomes 被引量:1
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作者 Xiang-Sheng Zhao Yue-Xiang Zeng +2 位作者 Ya-Kui Zhou Rong-Tao Li Mei-Hua Yang 《World Journal of Traditional Chinese Medicine》 2021年第1期138-145,共8页
Objectives:A rapid and sensitive gas chromatography–mass spectrometry(GC–MS)method for quantitative and qualitative analysis of essential oil from Curcuma wenyujin rhizomes was established.Methods:The essential oil ... Objectives:A rapid and sensitive gas chromatography–mass spectrometry(GC–MS)method for quantitative and qualitative analysis of essential oil from Curcuma wenyujin rhizomes was established.Methods:The essential oil of C.wenyujin rhizomes was extracted by supercritical CO2 extraction(SFE).Six main bioactive compounds(eucalyptol,β-elemene,curzerene,germacrone,curdione,and curcumol)were analyzed in selected ion monitoring mode(SIM).Results:Curzerene is not originally present in C.wenyujin rhizomes,but is a product of the transformation of furanodiene at high temperature.The six target components demonstrated good linearity(R2>0.9979)over a relatively wide concentration range.The interday and intraday variations had relative standard deviation values less than 5%and the average recovery ranged from 96.95%to 100.04%.The limit of quantitation ranged from 0.032 to 0.235μg/mL.The developed method was successfully used to analyze the six compounds in 17 samples collected from different origins.Significant variation was observed for the concentrations of the six compounds.In addition,51 constituents were identified in C.wenyujin rhizome essential oil,consisting of 87.66%of the total essential oil,including curdione,curzerene,dehydrocurdione,germacrone,1,4-bis(2-benzimidazoyl)benzene,neocurdione,curcumenone,andβ-elemene.Conclusions:The proposed method will be useful in the quality control of C.wenyujin rhizome essential oil production. 展开更多
关键词 Curcuma wenyujin essential oil gas chromatographymass spectrometry quantitative analysis supercritical CO2 extraction
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Sex Pheromone Components of the Female Black Cutworm Moth in China: Identification and Field Trials 被引量:5
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作者 向玉勇 杨茂发 李子忠 《Zoological Research》 CAS CSCD 北大核心 2009年第1期59-64,共6页
The sex pheromone blend of a China strain of the black cutworm moth Agrotis ypsilon (Rottemberg) (Lepidoptera: Noctuidae) was investigated. Chemical analysis of pheromone gland extracts of 3-day-old females showe... The sex pheromone blend of a China strain of the black cutworm moth Agrotis ypsilon (Rottemberg) (Lepidoptera: Noctuidae) was investigated. Chemical analysis of pheromone gland extracts of 3-day-old females showed that individual isolated glands contained only very small amounts of pheromone. The high-resolution gas chromatography combined with mass spectrometry (GC-MS) analysis showed the presence of Cis-7-dodecenyl acetate (Z7-12:Ac, A), Cis-9-tetradecenyl acetate (Z9-14:Ac, B), Cis- 11-hexadecenyl acetate (Z 11 - 16 :Ac, C), Cis-8-dodecenyl acetate (Z8-12:Ac, E) and Cis-5-decenyl acetate (Z5-10:Ac, D) in biologically active pheromone gland extracts. An extract of one gland from a day 3 female gave the following values for the gland components: 0.245±0.098ng for Z7-12:Ac, 0.080±0.031ng for Z9-14:Ac, 0.089±0.033ng for Z11-16:Ac, 0.085±0.031ng for Z5-10:Ac, 0.105±0.065ng for Z8-12:Ac per female. The percentages of Z7-12:Ac, Z9-14:Ac, Z11-16:Ac, Z5-10:Ac and ZS-12:Ac in pheromone gland extracts from individual females were (meaniSE) 40.451±13.66, 13.176±5.279, 14.943±5.142, 14.392±6.10 and 17.225±9.792 respectively, and the percentages of Z7-12:Ac, Z9-14:Ac and Z11-16:Ac were 58.75±9.429, 18.91±7.539 and 22.34±7.209. Field trials indicated that each single component of sex pheromone was non-effective and captured no males. The lures baited with duality compound of AB (3 : 1) had a certain attraction to males, the mean captured number was 2.6. The attraction ability of the lures baited with ternary compound of ABC (3 : 1 :1) to males added significantly, the mean captured number per trap was 7.40, which was 2.8 times of duality compound of AB (3 : 1). The contents of sex pheromone could obviously affect its capture ability to males, the mean captured number was the highest at the dosage of 200 μg. 展开更多
关键词 Agrotis ypsilon Chemical analysis Field trial gas chromatography/High-resolution mass spectrometry Internal standard Sex pheromone Standard chemicals
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基于联产工艺的橙皮精油气相色谱-质谱指纹图谱的构建及成分分析 被引量:1
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作者 许蓉蓉 黄婞焱 莫家钰 《食品安全质量检测学报》 CAS 2024年第14期188-194,共7页
目的构建果胶精油联产工艺获得的橙皮精油的指纹图谱,并进行成分分析。方法通过气相色谱-质谱法采集20批次橙皮精油样品的总离子流图(total ions current,TIC),运用“中药色谱指纹图谱相似度评价系统(2012版)”寻找共有峰并建立对照指... 目的构建果胶精油联产工艺获得的橙皮精油的指纹图谱,并进行成分分析。方法通过气相色谱-质谱法采集20批次橙皮精油样品的总离子流图(total ions current,TIC),运用“中药色谱指纹图谱相似度评价系统(2012版)”寻找共有峰并建立对照指纹图谱,采用美国国家标准与技术研究院(National Institute of Standards and Technology,NIST)谱库检索结合保留指数技术对共有峰进行成分鉴定,运用SPSS 29.0软件对共有峰进行主成分分析。结果指纹图谱的精密度、重复性和稳定性等方法学考察符合要求,所有样品TIC图相似度均大于0.998,提炼出9个共有峰,经过质谱鉴定,在共有峰中,D-柠檬烯相对含量最高,占82.77%,其次为月桂烯、烩烯、右旋α-蒎烯等,依次占比8.79%、3.62%、3.27%;经主成分分析,前两个主成分因子的累积方差贡献率为67.4%,微量成分烩烯和3-蒈烯对主成分因子的贡献最大。结论对由果胶精油联产工艺获得的橙皮精油建立了气相色谱-质谱指纹图谱,探明其共性化合物成分及影响力,为其质量控制提供了科学依据。 展开更多
关键词 果胶精油联产工艺 橙皮精油 气相色谱-质谱法 指纹图谱 保留指数 主成分分析
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液相色谱-质谱联用技术在中药研究中的应用
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作者 张荣召 徐鸿志 《山东化工》 CAS 2024年第10期151-153,共3页
液相色谱-质谱联用技术将液相色谱的高分离能力与质谱强大的定性功能相结合,可以实现对复杂样品高灵敏度、高选择性的快速分离和准确定性定量分析,广泛应用于药物分析研究特别是中药分析研究中。阐述了液相色谱-质谱联用技术在中药成分... 液相色谱-质谱联用技术将液相色谱的高分离能力与质谱强大的定性功能相结合,可以实现对复杂样品高灵敏度、高选择性的快速分离和准确定性定量分析,广泛应用于药物分析研究特别是中药分析研究中。阐述了液相色谱-质谱联用技术在中药成分研究,指纹图谱研究和中药代谢动力学研究中的应用,旨在对中药研究提供一定的技术支持。 展开更多
关键词 液相色谱-质谱联用仪 成分分析 指纹图谱 代谢动力学 应用
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Protective Effect of Distillate and Redistillate of Cow’s Urine in Human Polymorphonuclear Leukocytes Challenged With Established Genotoxic Chemicals 被引量:3
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作者 K.KRISHNAMURTHI DIPANWITA DUTTA +1 位作者 S.D.SIVANESAN T. CHAKRABARTI 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2004年第3期247-256,共10页
Objective From the ancient period cow’urine has been used as a medicine. In Veda, cow’urine was compared to the nectar. In Susrut, several medicinal properties of cow’ urine have been mentioned and are known to ca... Objective From the ancient period cow’urine has been used as a medicine. In Veda, cow’urine was compared to the nectar. In Susrut, several medicinal properties of cow’ urine have been mentioned and are known to cause weight loss, reversal of certain cardiac and kidney problems, indigestion, stomach ache, edema, etc. However, the literature and scripture did not mention the antigenotoxic properties of cow’urine. Methods In the present investigation, the antigenotoxic/ antioxidant properties of cow’ urine distillate and redistillate were studied in vitro. The antioxidant status and volatile fatty acid levels were determined. Actinomycin-D (0.1ol/L) and hydrogen peroxide (150 mol/L) were used for inducing DNA strand break with 0.1% DMSO as negative control. Dose for the antigenotoxic effect of cow’ urine was chosen from the dose response study carried out earlier. Results Both actinomycin-D and H2O2 caused statistically significant DNA unwinding of 80% & 75% respectively (P<0.001) as revealed by fluorimetric analysis of DNA unwinding (FADU), and the damage could be protected with the redistilled cow urine distillate (1, 50 & 100 ) in simultaneous treatment with genotoxic chemicals. Conclusion The redistillate of cowurine was found to possess total antioxidant status of around 2.6 mmol, contributed mainly by volatile fatty acids (1500 mg/L) as revealed by the GC-MS studies. These fatty acids and other antioxidants might cause the observed protective effects. 展开更多
关键词 Ammonia Antioxidants Cow urine distillate Cow urine redistillate Human polymorphonuclear leukocytes(PMNL) DNA damage Fluorimetric analysis of DNA unwinding(FADU) gas chromatography mass spectrometer(GC-MS) GENOTOXICITY Volatile fatt
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Genotoxicity of Pesticide Waste Contaminated Soil and Its Leachate 被引量:2
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作者 S.D.SIVANESAN K.KRISHNAMURTHI +1 位作者 S.D.WACHASUNDER T.CHAKRABARTI 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2004年第3期257-265,共9页
Objective Improper land disposal of hazardous waste can result in leaching of hazardous constituents which may contaminate ground and surface water leading to adverse impact on human health and environment consequenc... Objective Improper land disposal of hazardous waste can result in leaching of hazardous constituents which may contaminate ground and surface water leading to adverse impact on human health and environment consequences. The present study utilized mammalian cell culture for the genotoxicity assessment of waste and its leachate. Methods Genotoxic potential and chemical analysis of pesticide derived tarry waste contaminated soil extract and its leachate was assessed using in vitro human lymphocyte cultures and GC-MS. Results The investigation revealed that the soil extract could cause significant to highly significant genotoxicity in the form of DNA strand break at 25 mL (P<0.01), 50 mL, 100 mL and 200 mL (P<0.001) and chromosomal aberration at 25 mL (P<0.01) and 50 mL and 100 mL (P<0.001). The leachate could cause significant DNA strand break and chromosomal aberration only at 100 mL and 200 mL (P<0.01) dose levels. Conclusion The genotoxicity observed is attributed to carbaril and tetra methyl naphthyl carbamate, the major ingredients of the extracts, as revealed by GC-MS. 展开更多
关键词 GENOTOXICITY Soil extract LEACHATE DNA strand break Chromosomal aberration gas chromatography mass spectrometery (GC-MS) Fluorimetric analysis of DNA unwinding assay (FADU)
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Compound’s Pre-Screening of <i>Withania somnifera</i>, <i>Bacopa monnieri</i>and <i>Centella asiatica</i>Extracts
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作者 Steffi Witter Georg Arju +4 位作者 Marina Junusova Maria Kuhtinskaja Ago Samoson Raiker Witter Raivo Vilu 《Journal of Biosciences and Medicines》 2020年第9期80-98,共19页
Spectral fluorescence signature, Gas Chromatography-Mass Spectrometry and Liquid Chromatography-Mass Spectrometry for identification of chemical and bioactive compounds were applied to study the plant extracts of <... Spectral fluorescence signature, Gas Chromatography-Mass Spectrometry and Liquid Chromatography-Mass Spectrometry for identification of chemical and bioactive compounds were applied to study the plant extracts of <em>Withania somnifera</em>, <em>Centella asiatica </em>and <em>Bacopa monnieri </em>which are related to the possible treatment of mental diseases as Alzheimer, Parkinson and Depression. These plants are known for different positive phytotherapeutic effects on the human brain without negative post-, adverse or after effects to the treated individuals, and have been recommended in several medical studies. Therefore, we selected these plants for further analysis, based on the inhibition results of <em>in vitro</em> Amyloid Beta fibrillation tests made by previous measurements. With this study a first screening of the complex plant extract mixtures was performed, to get an initial overview about known and unknown ingredients. In all three plants, similar main compounds were identified, however in different quality and quantity. These may provide substantial information on which compound combinations might be mainly responsible for the positive effects and should be further investigated being responsible for reducing the fibrillation process of Amyloid Beta. 展开更多
关键词 gas chromatography-mass Spectrometry Liquid chromatography-mass Spectrometry Principal Component analysis spectra Fluorescence Signature EXTRACTS Withania somnifera Bacopa monnieri Centella asiatica
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Processing impact on volatile compounds profile in higholeic and normal peanut oil
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作者 Xuyan Dong Panpan Shi +3 位作者 Fang Wei Yong Lei Boshou Liao Hong Chen 《Oil Crop Science》 2016年第3期45-56,共12页
With the improvement of living quality, high-oleic peanuts have drawn people’s attention. Increasing oleic acid content of peanut oil should be desired for improving shelf life and potential health benefits. The fla... With the improvement of living quality, high-oleic peanuts have drawn people’s attention. Increasing oleic acid content of peanut oil should be desired for improving shelf life and potential health benefits. The flavor is among the most important quality attributes for commercial acceptance of peanuts products. The volatile components of high-oleic pea-nuts oil and normal-oleic lines were compared in this research. First, volatile components of peanut oils were analyzed and identified by solid-phase microextraction/gas chroma- tography/mass spectrometry (SPME/GC/MS). Then principal components analysis (PCA) was used to identify principal volatile components in peanut oils of different cultivars fo卜 lowing three different processing methods, including roasting, boiling and roasting, and roasting by microwave-assisted. The results showed that there were obvious differences of the volatile components between high-oleic and normal peanut oils. Among different pro-cessing method of peanuts, there was no clear separation on volatile components observed between roasting and boiling and roasting by microwave-assisted. Moreover, the same genotype had the similar flavor characteristic. Different processing methods had no signifi-cant effect on volatile components in peanut oils. 展开更多
关键词 high-oleic peanut volatile components solid-phase microextraction (SPME) gas chromatography/mass spectrometry (GC/MS) principal components analysis (PCA)
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Determination of selected semi-volatile organic compounds in water using automated online solid-phase extraction with large-volume injection/gas chromatography/mass spectrometry 被引量:1
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作者 Yongtao LI Christina L.MCCARTY Ed J.GEORGE 《Frontiers of Environmental Science & Engineering》 SCIE EI CSCD 2011年第3期417-425,共9页
A rapid,sensitive,and cost-effective analyticalmethod was developed for the analysis of selected semivolatileorganic compounds in water.The method used anautomated online solid-phase extraction technique coupledwith p... A rapid,sensitive,and cost-effective analyticalmethod was developed for the analysis of selected semivolatileorganic compounds in water.The method used anautomated online solid-phase extraction technique coupledwith programmed-temperature vaporization large-volumeinjection gas chromatography/mass spectrometry.Thewater samples were extracted by using a fully automatedmobile rack system based on x-y-z robotic techniquesusing syringes and disposable 96-well extraction plates.The method was validated for the analysis of 30 semivolatileanalytes in drinking water,groundwater,andsurface water.For a sample volume of 10 mL,the linearcalibrations ranged from 0.01 or 0.05 to 2.5μg·L^(-1),and themethod detection limits were less than 0.1μg·L^(-1).For thereagent water samples fortified at 1.0μg·L^(-1)and2.0μg·L^(-1),the obtained mean absolute recoveries were70%-130%with relative standard deviations of less than20%for most analytes.For the drinking water,groundwater,and surface water samples fortified at 1.0μg·L^(-1),theobtained mean absolute recoveries were 50%-130%withrelative standard deviations of less than 20%for mostanalytes.The new method demonstrated three advantages:1)no manipulation except the fortification of surrogatestandards prior to extraction;2)significant cost reductionassociated with sample collection,shipping,storage,andpreparation;and 3)reduced exposure to hazardous solventsand other chemicals.As a result,this new automatedmethod can be used as an effective approach for screeningand/or compliance monitoring of selected semi-volatileorganic compounds in water. 展开更多
关键词 automated solid-phase extraction programmed-temperature vaporization large-volume injection gas chromatography/mass spectrometry semi-volatile organic compounds water analysis
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天然气气质分析试验室的方案设计 被引量:1
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作者 张书勇 陈晓郁 +1 位作者 郭文龙 单富强 《石油工程建设》 2010年第S1期84-87,298-299,共6页
作为大型进口天然气管道工程,西气东输二线管道设置了天然气气质分析试验室。该试验室可以提供严格而权威的管输气气质评判基础数据,以保护买方的利益和长输管道安全运营,并为实现能量计量交接收集基础数据。介绍了试验室的设置背景、... 作为大型进口天然气管道工程,西气东输二线管道设置了天然气气质分析试验室。该试验室可以提供严格而权威的管输气气质评判基础数据,以保护买方的利益和长输管道安全运营,并为实现能量计量交接收集基础数据。介绍了试验室的设置背景、设计原则,对中、俄天然气标准进行了比较,确定了试验室的分析指标和检测方法,最后介绍了试验室的辅助功能设计。 展开更多
关键词 天然气 气质分析 试验室
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一种快速分离C_(60)/C_(70)的方法
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作者 陈小原 《武汉大学学报(自然科学版)》 CSCD 1995年第4期455-458,共4页
用硅胶柱色谱,以价廉的石油醚为洗脱剂,快速、简便的进行了C60/C70的分离.质谱分析证明C60的纯度可达98%以上.
关键词 柱色谱 质谱分析 碳60 碳70 分离
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腐泥煤和腐植煤生物标志物色谱对比 被引量:5
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作者 赵海舟 《中国煤田地质》 2002年第2期16-19,共4页
从代表低、中、高三个煤化阶段的三对共生样品的可溶组分的色谱质谱(GC/MS)联机分析的结果看,饱和烃和芳烃的组成,在腐泥煤和腐植煤两个变质系列中始终存在明显差异。比如腐泥煤的碳数分布较宽,OEP值始终都低于共生腐植煤;所含的芳烃种... 从代表低、中、高三个煤化阶段的三对共生样品的可溶组分的色谱质谱(GC/MS)联机分析的结果看,饱和烃和芳烃的组成,在腐泥煤和腐植煤两个变质系列中始终存在明显差异。比如腐泥煤的碳数分布较宽,OEP值始终都低于共生腐植煤;所含的芳烃种类少,数量也少,有些大大低于共生的腐植煤有些腐植煤中的标志物在腐泥煤中找不到。 展开更多
关键词 腐植煤 腐泥煤 变质系列 色谱-质谱联机分析 生物标志物 饱和烃 芳烃
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Developing an authentication approach using SPME-GC-IRMS based on compound-specific δ^(13)C analysis of six typical volatiles in wine
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作者 Xinyu Jin Limin Zhang +3 位作者 Shimin Wu Mingquan Huang Wenjuan Yu Shanshan Zhang 《Food Quality and Safety》 SCIE CSCD 2021年第1期56-66,共11页
An analytical method using gas chromatography isotope ratio mass spectrometry(GC-IRMS)combined with solid phase micro-extraction(SPME)was developed to measure the 613C values of six typical volatiles commonly occurrin... An analytical method using gas chromatography isotope ratio mass spectrometry(GC-IRMS)combined with solid phase micro-extraction(SPME)was developed to measure the 613C values of six typical volatiles commonly occurring in wine(isoamyl acetate,2-octanone,limonene,2-phenylethanol,ethyl octanoate and ethyl decanoate)for the first time.SPME selected with a divinylbenzene/carboxen/polydimethylsiloxane fiber was combined with the GC-IRMS for pretreatment optimization.The optimized SPME parameters of extraction time,extraction temperature and salt concentration were 40 min,40℃ and 10%,respectively.The 613C values measured by SPME-GC-IRMS were in good agreement with those measured via elemental analyzer(EA)-IRMS and GC-IRMS.The differences range from 0.02‰to 0.44‰ with EA-IRMS and from 0 to 0.28‰ with GC-IRMS,indicating the high accuracy of the method.This newly established method measured the precision within 0.30‰ and was successfully validated to discriminate imported real wine samples with identical label but amazing price differences from different importers. 展开更多
关键词 AUTHENTICITY δ^(13)C wine volatile compound-specific isotope analysis gas chromatography isotope ratio mass spectrometry solid phase micro-extraction.
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LC-MS在药物有关物质分析中的应用 被引量:13
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作者 高明 颜晓丹 +1 位作者 金松子 蒋庆峰 《药物评价研究》 CAS 2012年第1期63-66,共4页
液质联用技术以其高分离能力、高分辨率和专属性强的优势,在药物分析等方面得到广泛的应用。主要从串联四极杆质谱仪、四极离子阱质谱仪、四极杆-飞行时间质谱仪方面总结近年来液质联用技术在药物有关物质分析方面的应用。
关键词 液质联用技术 质谱:药物分析 有关物质
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