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Ni G Shen ZF Lu Y Wang YH Tang YB Chen RY Hao ZY Yu DQ 《The Journal of organic chemistry》2011,76(7):2056-2061
Three novel sesquinlignans, tatanans A (1), B (2), and C (3), have been isolated from the rhizomes of Acorus tatarinowii Schott. Their structures were established by spectroscopic techniques and single-crystal X-ray analysis. Tatanans A-C potently increase GK enzymatic activity with EC(1.5) values in the range of 0.16-1.85 μM. The potent GK activity and unique structural features of tatanans make them promising leads for therapeutic development of antihyperglycemic drugs. 相似文献
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目的:运用火焰原子吸收光谱法测定中药石菖蒲根中的 Fe、 Zn、 Mg、 Ca、 Cu 5种金属元素的含量。方法用浓 HNO3-HClO4消解样品,采用标准曲线法测定其5种金属元素含量。结果所测的样品中含有丰富的人体必需微量元素,尤其是 Fe 含量极高。方法回收率在98.60%~104.60%之间,样品相对偏差小于5%。结论该法简单、准确,结果令人满意。 相似文献
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将干八角粉碎至过2.00mm孔径的药筛,取20g样品间歇性喷雾加水至其含水量(质量分数)达50%,置于圆底烧瓶中,用LWMC-204微波化学反应器在180W微波功率进行无溶剂微波辅助提取(SFME),所得提取液用无水硫酸钠干燥置于4℃保存。此溶液用于气相色谱-质谱法测定其中的挥发油组分,将所得结果与SFME法和水蒸气蒸馏法(SD)所得数据对比,可知SFME法提取挥发油有以下特点:①该法仅需30min提取即可达到其最高提取率7.71%;②经此法分离后在挥发油中共测得25种化合物,达总量为98.94%;③所测得的含氧单萜类化合物高于SD法提取所得;④所测得挥发油的主要成分反式茴香脑的含量较SD法提取所得的量高1.4倍。 相似文献
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Qualitative and quantitative analysis of the major constituents in Acorus tatarinowii Schott by HPLC/ESI‐QTOF‐MS/MS 下载免费PDF全文
Rui Xue Zhixiong Li Kaicheng Zhu Ping Wan Chenggang Huang 《Biomedical chromatography : BMC》2015,29(6):890-901
Acorus tatarinowii Schott (ATS) is a well‐known traditional Chinese medicine (TCM) for the treatment of epilepsy, amnesia and insomnia. In this study, a methodology utilizing high‐performance liquid chromatography (HPLC) coupled with electrospray ionization quadrupole time‐of‐flight mass spectrometry (ESI‐QTOF‐MS/MS) was established for the separation and structural identification of the major chemical constituents in ATS for the first time. Overall, 46 major constituents including flavonoid glycosides, phenylpropane derivatives, amides and lignans were identified or tentatively characterized. Seven major constituents, including four phenylpropane derivatives and three lignans, were further quantified as marker substances, which showed good linearity within the test ranges. These results indicated that the developed quantitative method was linear, sensitive, and precise for quality control of ATS. Copyright © 2014 John Wiley & Sons, Ltd. 相似文献
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Summary A fast and simple headspace SPME sampling method has been developed for quantification of volatile aliphatic aldehydes in
sunflower oil. Analysis has been performed by gas chromatography, on a 30m×0.25 mm i.d. ×0.25 μm CP-Wax 52CB column, with
mass spectrometric detection. Carryover from the SPME fiber could be eliminated by heating the fiber in the injection port
between runs. Response factors of all the compounds were linear for concentrations up to 100 ng μL−1. The slopes of the calibration curves decrease with the amount of saturation of the aldehydes. The average responses for
unsaturated aldehydes were twice as high as those for the saturated variety. Responses for dienes were approximately one order
of magnitude higher than for saturated aldehydes. Depletion of the analyte was examined by repeated extraction from the same
vial. SPME was optimized—after 30 min extraction most components were found to have reached equilibration. The detection limit
for the compounds studied varied between 0.1 and 1 ng μL−1. Distribution constants were determined for ten different aldehydes and Henry's constants were calculated for unsaturated
aldehydes. There was a definite relationship between the response factors and the amount of saturation of the aldehydes.
Presented at: Balaton Symposium on High-Performance Separation Methods, Siófok, Hungary, September 3–5, 1997 相似文献
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用熵最小算法解析桂郁金挥发油GC-MS重叠谱 总被引:1,自引:0,他引:1
采用气相色谱-质谱(GC-MS)联用技术对桂郁金中提取的挥发油成分进行检测,同时用熵最小算法对其中的共流物色谱峰进行解析,并通过质谱库检索和程序升温保留指数相结合的方式对解析得到的各纯组分进行定性分析。将桂郁金挥发油各组分的质谱数据直接与美国国家标准及技术研究所(NIST)数据库进行比对,鉴定出38个化合物;在挥发油的色谱图中,存在一些因分离不完全而导致的共流物色谱峰,以保留时间为1 106.52~1 108.38 s及1 184 s的色谱峰为例,经熵最小算法解析,共发现5个纯组分。采用熵最小算法可以清楚地对共流物色谱峰进行解析并得到所包含的各个纯组分,该法可提高复杂成分定性定量分析结果的准确性。 相似文献
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Payman Hashemi Mohammad Shamizadeh Alireza Badiei Ali Reza Ghiasvand Khosro Azizi 《Chromatographia》2009,70(7-8):1147-1151
An ultrasound assisted SPME method with a new nanoporous SBA-15 fiber functionalized with 3-[bis(2-hydroxyethyl)amino]propyl-triethoxysilane was successfully applied to the study of the essential oil composition of cumin (Cuminum cyminum L.) seeds. The sample was irradiated by ultrasound radiation and its volatile components were collected by the fiber from the sample headspace and directly injected into a GC-MS injection port for analysis. A simplex method was used for optimization of four different parameters affecting the efficiency of the extraction. Under the optimized conditions (i.e. sample weight, 0.6 g; temperature, 70 °C; sonication time, 12 min and extraction time, 28 min), the number of components identified by the proposed method and their amounts were identical to those of a hydrodistillation technique. The extraction efficiency of the SBA-15 fiber was superior to a PDMS commercial fiber. The major components identified were p-menta-1,3-dien-7-al, cuminaldehyde, γ-terpinene and p-cymene, respectively. The proposed method was applied to a comparative study of the essential oil composition of cumin in three different climate conditions of the Lorestan province in Iran. The results indicated that the essential oils in the temperate and tropical locations were 94.0 and 85.6% of the cold region, respectively. 相似文献
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GC-MS Analysis of the Essential Oil from the Oleoresin of Pistacia atlantica var. mutica 总被引:1,自引:0,他引:1
The oleoresin of Pistacia atlantica var. mutica, growing in different regions of Iran, is a popular naturally occurring chewing gum and has been used traditionally in the treatment of peptic ulcer. The GC-MS analysis of the essential oil, obtained from steam distillation of the oleoresin of P. Atlantica var. mutica, has led to the identification and quantification of eleven terpenoids, -pinene (70%), -pinene (1.94%), 3-carene (0.2%), carveol (2.18%), epoxypinene (2.15%), limonene oxide (9%), myrtenol (5.31%), limonene (0.62%), citral (5.72%), -phellandrene (0.2%), and -myrcene (0.3%). The total amount of essential oil obtained was 22% v/w which is higher than any other species of the genus Pestacia. 相似文献
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Huangxian Zhang Ting Huang Xiaoning Liao Yaohong Zhou Shangxing Chen Jing Chen Wanming Xiong 《Molecules (Basel, Switzerland)》2022,27(17)
The essential oil extracted from Cinnamomum camphora leaves is a mixture of volatile compounds, mainly terpenes, and is widely used in medicine, perfume and chemical industries. In this study, the extraction processes of essential oil from Cinnamomum camphora leaves by steam distillation and supercritical CO2 extraction were summarized and compared, and the camphor tree essential oil was detected by GC/MS. The extraction rate of essential oil extracted by steam distillation is less than 0.5%, while that of supercritical CO2 extraction is 4.63% at 25 MPa, 45 °C and 2.5 h. GC/MS identified 21 and 42 compounds, respectively. The content of alcohols in the essential oil is more than 35%, and that of terpenoids is more than 80%. The steam extraction method can extract volatile substances with a low boiling point and more esters and epoxides; The supercritical method is suitable for extracting weak polar substances with a high alcohol content. Supercritical CO2 extraction can selectively extract essential oil components and effectively prevent oxidation and the escape of heat sensitive substances. 相似文献