esi orbitrap ms质谱 ESI(Electrospray Ionization)轨道式质谱法(Orbitrap Mass Spectrometry)是现代质谱分析技术中的一种高分辨率质谱技术。它是基于质谱仪中的离子陷阱和轨道飞行时间(Orbitrap)两种技术的结合,能够提供高灵敏度、高分辨率和高质量的分析结果。 ESI质谱法使用电喷雾(Electrospray)的方式将待测物溶液在电场...
因此,本研究基于血清代谢组学,首次对人参固本口服液对食蟹猴颈椎术后疗效进行研究,并对代谢组学的研究结果进行验证。本研究利用UHPLC-ESI-QE-Orbitrap-MS技术研究了人参固本口服液干预食蟹猴人工颈椎间盘置换术后血液代谢组学,以探讨...
et al. A guide to precise measurements of isotope abundance by ESI-Orbitrap MS. Nat Protoc 19, 2435–2466 (2024). https://doi.org/10.1038/s41596-024-00981-5 Download citation Received31 March 2023 Accepted08 February 2024 Published23 April 2024 Issue DateAugust 2024 DOIhttps://doi.org/...
基于UPLC-ESI-LTQ-Orbitrap-MS技术的瓜蒌薤白半夏汤物质基础研究.pdf,目录 基于UPLC-ESI-LTQ-Orbitrap-MS技术的瓜蒌薤白半夏汤物质基础研究I 摘要I ABSTRACTII 常用缩写词中英文对照表III 引言1 第一部分 基于UPLC-LTQ-Orbitrap 高分辨质谱的中药瓜蒌化学成分分析3 1材料与
(Palo negro) extracts by HPLC/UV (DAD)-Mass Spectrometry (HPLC/MS). The plant is used for the treatment of several diseases since pre-hispanic Mapuche times. Thirty-seven compounds were detected in the aqueous edible extract for the first time including 4 sesquiterpenes, 10 flavonoids, 9 ...
进一步采用 UHPLC-ESI-QE-Orbitrap- MS 技术对蛤蚧定喘丸醇提物进行物质分析 ,典型 图谱见图 3. 根据二级质谱碎片结构 ,相对分子质量和 mzCloud 数据库,共鉴别出 36 种主要物质,见表 2. 3.4 蛤蚧定喘丸抗炎机制的探索 表 2 中鉴定得出的 36 种化学物质中,已报道具 有抗炎功效的化学物质有 9 种,见表 3...
目的:利用相对和绝对同位素标记(iTRAQ)和纳升级两维高效液相色谱-电喷雾-OrbiTrap质谱(2D nanoHPLC-ESI-OrbiTrap MS/MS)蛋白组学方法探寻卵巢癌血清标记物,以提高早期卵巢癌诊断率.方法:收集卵巢癌患者血清20例(卵巢癌组),CA125异常的卵巢良性囊肿16例(良性囊肿组),健康者20例(正常对照组),每组取10例组内等量混合...
UHPLC-ESI-Orbitrap MS and UHPLC-ESI-QqQ MS were employed for the qualita- tive and quantitative analysis respectively. Totally, 160 constituents were detected and identified from 6 fractions of Maca extract. Fifteen of them were selected for the quality control study. Furthermore, the ...
Keywords: selenium; UHPLC-ESI-Orbitrap-MS; Candida; yeast 1. Introduction Selenium (Se) is a significant trace element for all organisms. Research on the role of this element in numerous biological systems has been rapidly developing. This element is included in 35 selenoproteins. Selenium, as ...
fertilisation; HRMS, high resolution mass spectrometry; LTQ, linear ion trap; MS/ MS, two-stage mass analysis; MS n , multi-stage mass analysis; HPLC, high perfor- mance liquid chromatography; MTC, maximum tolerable concentration; AGC, automatic gain control; HCD, high-energy C-trap dissociati...