2.2 色谱及质谱条件 定的覆盖范围 ,提高效率和准确性 ,成为了一种重 2.2.1 色谱条件采用 UPLC-Q-TOF/MSE 技术对 要的现代分离分析方法 ,在化合物定性方法中具有 重要作用[6].超高效液相色谱-四极杆-飞行时间质 谱 (ultra performance liquid chromatography- quadrupole-time of flight-mass spectrometry,UPLC-...
方法 采用超高效液相色谱-飞行时间质谱联用技术(UPLC-Q-TOF/MS)分析了肉苁蓉酒炙前后成分 变化,并运用主成分分析法和正交偏最小二乘判别法分析酒炙前后肉苁蓉化学成分量的变化.结果 研究首次揭示肉苁蓉酒 炙增效的物质基础,松果菊苷,毛蕊花糖苷,β-谷甾醇,胡萝卜苷,蔗糖,次黄嘌呤核苷的量升高,其中以苯乙醇苷...
Ions Ions (产生离子) (离子传输) (选择离子) (检测离子) Data Out (数据输出) 76 Q Exactive: Orbitrap Split Lens Orbitrap质量分析器 77 Orbitrap 的外部结构 中心电极 纺锤形外电极 78 Original Orbitrap and High Field Orbitrap Real Size Cutaway D20 D30 79 Principle of trapping in the Orbitrap ?
High-resolution MS, especially the hybrid quadrupole time-of-flight mass spectrometry (Q-TOF MS), has become the most common analytical tool for TCM study [8,9]. In LC-Q-TOF MS analysis, the accurate m/z (mass-to-charge ratio) recorded in MS and MS/MS spectra could provide crucial ...
The other hydrolysate 3-chloro-5-(trifluoromethyl) pyridin-2-amine (metabolite 2, M2) was determined and identified according to accurate mass information, fragmentation patterns and principle component analysis (PCA). By utilizing high-resolution mass spectrometry and multivariate statistical analysis, ...
There are at least one hundred traditional Chinese formulas taking Corydalis Rhizoma as the principle medicine and it is mainly used to relieve pain and treat stagnation of the circulation of Qi, blood stasis in clinic. Corydalis Rhizoma was also reported to have activities of anti-gastric ulcer,...
Serum and urine samples of rats were collected and analyzed by ultra-high-performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF/MS). A comparison with crude kansui was also made to demonstrate the feasibility of processing. Principle component analysis...
Mass spectrometry in the structural analysis of flavonoids. J. Mass Spectrom. 2004, 39, 1–15. [Google Scholar] [CrossRef] [PubMed] Yang, M.; Li, J.; Zhao, C.; Xiao, H.; Fang, X.; Zheng, J. LC-Q-TOF-MS/MS detection of food flavonoids: Principle, methodology, and ...
Keywords: blood stasis;AEE;aspirin;metabolomics;UPLC-Q-TOF/MS Graphical Abstract
Time-of-Flight secondary ion mass spectrometry (TOF-SIMS) is a very sensitive surface analytical technique, well established for many industrial and research applications. 飞行时间二次离子质谱(TOF- SIMS)是一种非常灵敏的表面检测技术。 18. 56kb Through the optimization of second cooling technology...