叶下花挥发油化学成分的GC/MS分析

叶下花(Ainsliaea pertyoidesFr.var.albo-tom en-tosaBeauverd)(又名白背兔耳风)为菊科帚菊木族兔耳风属药用植物。兔耳风属全世界70余种,我国有44种4变种,约占总数的37·5%。兔耳风属植物药用种类较多,广泛用于治疗感冒咳喘、风湿痹痛、跌打损伤、活血止血、肠炎痢疾、咽喉炎     

GC/MS法分析油松节挥发油化学成分

用气相色谱-质谱法对山东昆嵛山产油松节挥发油进行化学成分的分析。采用水蒸气蒸馏法从油松节中提取挥发油。采用不同类型的毛细管柱进行分析，找出最佳分析条件，用归一化法测定其含量，并用气相色谱-质谱法对化学成分进行鉴定。共鉴定了48个成分，占挥发油总成分的84％以上。结果表明，此方法稳定可靠，重现性好，适用于中药挥发油的化学成分分析。     

纤维素酶前处理没药挥发油成分的GC/MS分析

采用水蒸汽蒸馏法分别从未处理和纤维素酶前处理的没药中提取挥发油,利用气相色谱-质谱(GC/MS)联用技术对其挥发油成分进行分析。从中分别鉴定出38种和34种化学成分,用峰面积归一法通过数据处理系统得出各化学成分在挥发油中的质量分数,占挥发油总成分的67.95%和70.05%。     

野生新鲜鸡屎藤挥发性化学成分的GC/MS分析

利用气相色谱-质谱联用(GC/MS)技术对广东野生新鲜鸡屎藤地上部分的挥发油化学成分进行了分析研究,鉴定出了11种化学成分,主要成分有反(式)-2-已烯醇-1(73.60%)、3-已烯醇-1(18.80%)、正已醇(1.87%)、二甲基二硫化物(1.70%).     

GC／MS法测定木香挥发油化学成分

用气相色谱-质谱法对木香挥发油进行化学成分的分析。采用水蒸气馏法从木香中提取挥发油。试用不同类型的毛细管柱进行分析,找出最佳分析条件,用归一化法测定其含量,并用气相色谱-质谱法对化学成分进行鉴定。共鉴定了38个成分,占挥发油总成分的86%以上。方法稳定可靠。重现性好,适用于中药挥发油的化学成分分析。     

单叶蔓荆子挥发油成分的GC/MS分析

采用气相色谱／质谱（ＧＣ／ＭＳ）联用技术对山东泰山产单叶蔓荆子挥发油的化学成分进行了分析,分离出３０多个峰,确认了其中２８种成分,占总离子流的９５％以上,并对挥发油的主要化学成分Δ３－蒈烯,用气相色谱／傅里叶红外光谱（ＧＣ／ＦＴＩＲ）法进行了验证。     

GC/MS法研究苦黄注射液中挥发油成分

利用气相色谱-质谱联用装置分析了苦黄注射液中挥发油的化学成分及相对含量。共鉴定了55个化合物，其中以单萜和倍半萜为主，占已鉴定的挥发油种类的56．36％和3．63％，为挥发油的主要成分。     

GC-MS法测定菥蓂子石油醚萃取物中的化学成分

分析了菥蓂子石油醚萃取物中的化学成分及其相对含量。菥蓂子乙醇提取物经石油醚萃取后,采用GC-MS法测定,通过NIST05谱库检索并通过分析,鉴定出多种化学成分。在此基础上按峰面积归一化法计算各化合物在挥发油中的相对百分含量。从菥蓂子石油醚萃取物中鉴定出24中化合物,其中相对含量最高的顺-7-十四烯醛为20.77%。油酸含量为9.14%,不饱和脂肪酸含量13.52%,不饱和化合物含量57.52%。菥蓂子石油醚萃取物中的化学成分包括烷烃、醇、醛及脂肪酸等化学成分。     

中药药对的化学成分研究川芎-赤芍挥发油的GC/MS分析

中药药对是复方的最小组成单位,具有中药配伍的基本特点. 药对化学是复方化学的核心内容. 联用色谱和化学计量学方法为中药复杂体系的分离与分辨提供了强有力的工具. 采用GC-MS法分离测定中药药对川芎-赤芍、 单味药川芎和赤芍的挥发油成分,并对其中的重叠色谱峰采用化学计量学解析方法(CRM)进行分辨,得到药对和各单味药的纯色谱曲线和质谱图,药对川芎-赤芍、 单味药川芎和赤芍分别分辨出82,78和57个色谱峰,通过质谱库对分辨的纯组分进行定性,分别得到61,52和33个定性结果,占总含量的90.18%,95.14%和95.82%.     

乌梅二氯甲烷提取物化学成分的GC/MS分析

采用GC-MS联用方法对乌梅二氯甲烷超声提取物和索氏提取物的化学成分分别进行分析。索氏提取物分离了16个峰,经数据库鉴定出13种成分。超声提取物分离了16个峰,经数据库签定出12种成分。     

Chemical composition and cytotoxicity of the essential oil from different parts of Datura metel L.

The essential oil from different parts of Datura metel L. were extracted using hydrodistillation and GC–MS was used to analyse the essential oil. The main components of flowers were ketone (23.61%) and ethyl palmitate (15.84%). The main components of leaves were ketone (18.84%) and phytol (18.71%). Ketone (39.45%) and phytol (31.32%) were the major components of petioles. Palmitic acid (30.60%) and ethyl linoleate (21.56%) were the major components of seeds. The major ingredient of roots was palmitic acid (52.61%). The main ingredients of the stems were palmitic acid (38.38%) and ethyl linoleate (17.38%). All the different parts of essential oil were screened for cytotoxicity. The roots and stems showed the inhibitory effects against HepG-2 with IC₅₀ levels of 613.88 and 341.12 mg/L. The leaves and roots showed the inhibitory effects against HeLa with IC₅₀ levels of 267.76 and 348.35 mg/L. All the six parts have inhibitory effects against SGC-7901 cell lines.     

香芸火绒草精油化学成分研究

用毛细管气相色谱／质谱、毛细管气相色谱／付里叶红外联用技术对青海产香芸火绒草精油化学成分进行分离。共鉴定出１１９个化俣物，占全部峰面积的９６．８％。     

海棠果种子油脂肪酸成分研究

用乙醚萃取海棠果种子油,油脂皂化后的脂肪酸采用三氟化硼-甲醇溶液进行甲酯化.采用气相色谱-质谱-计算机联用技术分离、鉴定出7种主要脂肪酸,进一步采用气相色谱法定量测定脂肪酸,分别为肉豆蔻酸0.02%,软脂酸8.64%,硬脂酸8.96%,油酸37.7%,亚油酸20.1%,亚麻酸0.38%,二十碳酸0.85%.结果表明,海棠果种子油不饱和脂肪酸质量分数高达58%,值得作为不饱和脂肪酸食用油来源开发.     

Essential oil from Rhaponticum acaule L. roots: Comparative study using HS-SPME/GC/GC–MS and hydrodistillation techniques

The composition of essential oil extracted from Rhaponticum acaule L. roots growing wild in Algeria was studied by hydrodistillation (HD) and by Head-Space Solid Phase Micro-Extraction (HS-SPME). Quantitative but not qualitative differences have been found in the chemical composition of both analysed samples depending on the extraction method. However, the oil obtained from R. acaule roots shows that aliphatic alcohols were found to be the major class (69.2%), followed by the terpenes (5.5%), alkenes (5.2%) and alkynes (4.0%). In both cases the analysis were carried out using Gas Chromatography (GC) and Gas Chromatography–Mass Spectrometry (GC–MS). Our study shows that HS-SPME extraction could be considered as an alternative technique for the isolation of volatiles from plant. 25 components were identified in oil vs. 39 in the HS-SPME. However the oil composition of roots was mainly represented by a variety of aliphatic hydrocarbons (alcohols, aldehydes and ketones) and terpenes which are known for their antimicrobial activities.     

Phytochemical analysis of Saponaria officinalis L. shoots and flowers essential oils

Phytochemical analysis by GC and GC/MS of the essential oil samples obtained from fresh shoots and flowers of Saponaria officinalis L. allowed the identification of 96 components in total, comprising 94.7% and 86.0% of the total oils compositions, respectively. Regarding the shoots essential oil, the major of 87 identified volatile compounds were phytol (14.1%), tricosane-6,8-dione (13.4%), patchouli alcohol (7.9%) and tricosane (7.2%), whereas patchouli alcohol (20.0%), heneicosane (11.5%) and tricosane (8.4%) were dominant among the 66 volatiles in the flower oil. Nonterpenoid compounds had the highest contribution in S. officinalis shoots essential oil (53.7%), while in the flower oil, constituents were almost evenly distributed between the oxygenated sesquiterpenoid (41.2%) and nonterpenoid compounds (39.5%).     

Components Essential Oils in Different Parts of Daucus carota L. var. sativa Hoffm

The components of the essential oils obtained from different parts of Daucus carota L. var. sativa Hoffm were analyzed. The percentages of the essential oils extracted are 0. 27% (mL/100 g material) for the flowers, 0. 07% for the stems and leaves and 0. 01% for the roots. Fifty-four, Sixty-six and Thirty-three compounds were, respectively,separated and identified from the flowers, the stems and leaves and the roots, among which unsaturated alkene compounds are thirty-nine, thirty-nine and twenty-one, respectively, accounting in turn for up to 90. 21%, 90. 49% and 72. 65% of the total essential oils. Because alkene compounds have double bonds that are easily oxidized, it can be inferred that the components of the essential oils in the different parts of Daucus carota L. var. sativa Hoffm should show an activity of the anti-formation of free radicals to some extent.     

Components of Essential Oils in Different Parts of Daucus carota L. var. sativa Hoffm

Introduction Carrots,avegetablewithabundantnutrition,are therootsofDaucuscarotaL.var.sativaHoffm[1],whichisanumbelliferaeplant.Carrotsshowanti can cerandanti oxidationactivities.Theycanalsobeused topreventeyediseasesandimproveimmunity[2—11],thefactsareun…     

气相色谱/质谱法分析曼陀罗果实挥发油的化学成分

用水蒸汽蒸馏法从曼陀罗果实中提取挥发油,并用气相色谱/质谱(GC/MS)联用技术对其化学成分进行分离和结构鉴定,用峰面积归一化法确定各成分的相对含量。结果确定了68种化合物,占挥发油总量的82.83%,其主要成分为6-戊基-5,6-二氢化吡喃-2-酮(9.13%)、3,7,11,15-四甲基-2-十六碳烯-1-醇(6.71%)、二苯酮(6.16%)和1-己醇(6.10%)等。     

Components of Essential Oils in Different Parts of Daucus carom L. var. sativa Hoffm

The components of the essential oils obtained from different parts of Daacus carota L.var. saliva Hoffm were analyzed. The percentages of the essential oils extracted are 0. 27% （ mL/100 g material） for the flowers, 0. 0/% for the stems and leaves and 0. 01% for the roots. Fifty-four, Sixty-six and Thirty-three compounds were,respectively, separated and identified from the flowers, the stems and leaves and the roots, among which unsaturated alkene compounds are thirty-nine, thirty-nine and twenty-one, respectively, accounting in turn for up to 90. 21%, 90. 49% and 72. 65% of the total essential oils. Because alkene compounds have double bonds that are easily oxidized, it can he inferred that the components of the essential oils in the different parts of Daucus carota L. var. saliva Hoffm should show an activity of the antioformation of free radicals to some extent.