共查询到19条相似文献,搜索用时 396 毫秒
1.
2.
3.
采用UHPLC-Q-TOF MS结合化学计量学方法分析川芎硫磺熏蒸前后化学成分的变化。选取19批未经硫磺熏蒸川芎饮片、11批实验室自制硫磺熏蒸川芎饮片和9批市售硫磺熏蒸川芎饮片作为实验样品,制备供试品溶液进样后,应用PeakView1.2软件依据一级质谱的精确质荷比和二级质谱的碎片信息进行成分解析,并结合MarkerView1.2.1软件进行主成分分析(PCA)和t检验,鉴定其中的共有成分和差异性成分。结果表明,在PCA分析中,正负离子模式下的未硫熏和硫熏川芎样品均可被明显地区分开,主成分之间存在明显的差异;t检验结果也显示二者之间存在大量的差异性成分,同时鉴定出部分差异性成分,并进一步推测了其可能的转化方式。本实验可为研究硫磺熏蒸对川芎质量的影响提供客观参考,并为控制硫磺熏蒸在中药材和饮片加工过程中的过度应用和确保中医临床用药的安全提供理论依据。 相似文献
4.
5.
6.
7.
8.
将序贯代谢法与超高效液相色谱-串联质谱(UPLC-MS/MS)相结合,研究石榴皮发挥中枢神经系统保护作用的物质基础。首先制备石榴皮提取液,通过肠灌流和封闭肠环法收集肠壁代谢、肠道菌群代谢的血浆样品,经液相色谱-串联质谱分析以原型吸收入血成分和代谢产物;综合代谢组大鼠灌胃给药后,鉴定其血中移行成分;再结合以上结果对脑脊液样品进行解析,鉴定出入脑成分。结果表明,从提取液中共检测到鞣质类、黄酮类、酚酸类和异香豆素类等38个化学成分。肠壁代谢、肠道菌群代谢情况基本一致,检测到30个原型入血成分和12个代谢产物;综合代谢组血浆中检测到7个原型入血成分和16个代谢产物;在脑脊液中发现2个原型成分和4个代谢产物,分别是柠檬酸、鞣花酸和2个甲基鞣花酸同分异构体、二甲基鞣花酸、二甲基鞣花酸葡萄糖醛酸化物。本研究基于多成分序贯代谢靶向识别出石榴皮及其代谢产物中入脑成分,可为阐明石榴皮中枢神经系统保护作用提供证据。 相似文献
9.
将灌冠红梅子根的乙醇提取物用甲醇溶解,加水,用石油醚萃取,采用GC/MS法进行分析。以峰面积归一化法计算各化合物在挥发油中的相对含量,共鉴定出个22化学成分,占总体含量的 98.32%。主要成分有4-甲基-2-乙基己烷(14.79%)、反式-1-甲氧基-1-丁烯(13.41%)、2,3,3-三甲基己烷(10.24%)、(1-甲氧基-1-戊基)环丙烷(10.22%)、N,N-二甲基叔丁基胺(9.23%)、环己烷(8.55%)、1,1-二甲氧基-2-丁炔(6.34%)、2-甲基-2-乙基环氧乙烷(6.25%)、庚烷(4.38%)、正十一烷(3.6%)、1-碘正十四烷(2.6%)。 相似文献
10.
11.
12.
Lailai Wong Zhitao Liang Hubiao Chen Zhongzhen Zhao 《Microscopy research and technique》2011,74(4):320-328
Chinese Materia Medica (CMM) decoction dregs are the residues of medicinal materials after decoction. Accurate identification of CMM in decoction dregs will be helpful for exploring the causes of poisoning or other medical incidents arising after the ingestion of CMM decoctions. To determine how decoction affects the characteristics used to authenticate specific CMM, a systematic study was carried out. In this study, two pairs of Materia Medica that are commonly confused—namely, Baizhu (Atractylodis Macrocephalae Rhizoma) and Cangzhu (Atractylodis Rhizoma), Baishao (Paeoniae Alba Radix) and Chishao (Paeoniae Rubra Radix)—were chosen for investigation. Each pair of Materia Medica has similar morphology in appearance, but they have different functions in Chinese clinic. After decoction, with regard to gross morphological characters, the results showed that bark and wood could be easily distinguished. The striation of vessels and fibers became more prominent because of the contraction of parenchymatous cells, but the lignified cells did not. As for the microscopic characteristics, the cells with thickened walls, such as stone cells and fibers, were basically stable. Most of the parenchymatous cells were broken. Crystals of calcium oxalate showed no changes as they were insoluble in water. Starch granules were gelatinized and aggregated in parenchymatous cells. Inulins were substantially reduced in number as they dissolved in water during decoction. According to these changes in morphological and microscopic characteristics after decoction, the dregs of two pairs of Materia Medica could be distinguished. Microsc. Res. Tech., 2011. © 2010 Wiley‐Liss, Inc. 相似文献
13.
14.
Zhao ZZ Hu YN Wong YW Gigi Wong WC Wu K Jiang ZH Kang T 《Microscopy research and technique》2005,67(6):305-311
To establish a quality control method for the Chinese Patent Medicine (CPM)-Bo Ying Compound (BYC), a comparison study was carried out on it with microscopy. The micro-morphological characteristics of its 22 components in the CPM and in the crude constituents have been documented and compared with each other. Their corresponding features were described and documented with color digital micrographs, so as to authenticate the presence of genuine crude constituents in BYC. The results showed that almost all constituents of BYC are found within their representative fragments in the CPM except one (Borax) that could dissolve or merge with the other components. Also the study indicated that light microscopy, an easy and economical method, could be used for the identification of this kind of CPM that contains plant and animal materials without the specific characteristic chemical marker compounds. 相似文献
15.
为全面了解中药大品种血栓心脉宁片(XXT)化学成分,采用超高效液相色谱-四极杆飞行时间串联质谱联用技术(UPLC-Q-TOF MS)测定该复方制剂的小分子成分(100~1 500 u),通过UNIFI天然产物分析平台,比对各成分的精确分子质量、保留时间及质谱碎片离子信息,分析鉴定各化合物结构。结果表明,在XXT中共鉴定出187种化学成分,包括三萜皂苷类、菲醌类、蟾蜍甾二烯类和甾体类及其他结构类型的化合物。血栓心脉宁片富含小分子化学成分且结构类型多样,是其发挥抗血瘀活性及多靶点作用机制的物质基础。该研究可为阐明XXT的药效物质基础和提升质量控制标准提供数据参考。 相似文献
16.
新疆拟百里香挥发油的气相色谱-质谱分析 总被引:2,自引:0,他引:2
利用水蒸气蒸馏法提取了新疆拟百里香挥发油,测得含量为0.16%。采用气相色谱-质谱联用技术对拟百里香的挥发性成分进行分离鉴定,分离出73种成分,共确认了其中的69种成分。用峰面积归一化法确定了各成分的相对含量,其中主要成分为百里香酚(27.99%)、p-聚伞花素(25.42%)、γ-松油烯(17.95%)、β-甜没药烯(3.87%)、香芹酚(2.5%)、4-蒈烯(2.39%)、长叶薄荷酮(1.99%)、内冰片(1.68%)、β-月桂烯(1.35%)、石竹烯(1.09%)和α-崖柏烯(1.01%)。 相似文献
17.
新疆没药挥发油的气相色谱-质谱分析 总被引:6,自引:3,他引:6
利用水蒸气蒸馏法提取维吾尔医用药材没药挥发油成分,运用气相色谱-质谱联用技术,结合计算机质谱图库检索技术对分离的化合物进行结构分析,共鉴定了42个成分,占挥发性物质含量的87.46 %。应用峰面积归一法确定各成分的相对含量。萜烯类及其衍生物占较大比例,主要有:α -香柠檬烯(12.52 %)、β-蛇床烯(8.75%)、β-红没药烯(10.03%)、2-羟基-2,4,6-环庚三烯-1-酮(6.25%)等。 相似文献
18.
采用气相色谱 -质谱 (GC/ MS)技术和标准图谱检索对照的方法分离和鉴定到手香挥发油中各化学组分 ,用离子流色谱峰面积归一化法计算各化学成分的相对含量。共分离出 3 4种化合物 ,并鉴定其中 2 5种化合物 ,其相对含量占总挥发油的 98.62 %。到手香挥发油主要成分为香芹酚 (5 7.82 % )、β-石竹烯 (1 5 .2 4% )、γ-萜品烯 (1 0 .0 1 % )、α-佛手柑烯 (8.69% )、间伞花烃 (5 .65 % )、α-石竹烯 (2 .3 2 % )、氧化石竹烯 (1 .1 3 % )及它们的异构体等。 相似文献
19.
采用超高效液相色谱-线性离子阱-串联静电轨道阱高分辨质谱(UHPLC-LTQ-Orbitrap HRMS)法对薄荷水提物中4种类群化学成分进行分析鉴定。选取Acquity UPLC~BEH C18色谱柱(2.1mm×100mm×1.7μm),以乙腈-0.1%甲酸水溶液为流动相,流速0.30mL/min,梯度洗脱分析。根据高分辨质谱提供的准分子离子峰和碎片离子信息,获取目标化合物的相对分子质量和结构信息,并结合保留时间、对照品分析、参考文献数据和ClogP值等相关信息,鉴定了85种化学成分,包括38种黄酮、16种酚酸、7种苯丙素和24种萜类。结果表明,采用UHPLC-LTQ-Orbitrap HRMS技术能够提高中药化学成分的分析效率,该方法可为合理开发薄荷的药用和食用价值奠定化学基础。 相似文献