质量分析器的作用简单来说就是将在离子源中电离后产生的带电离子根据其质荷比的不同分离开来。本研究过程中使用的质量分析器是三重四级杆(triplequadrupolemassspectrometr-y,tqms)。三个四级杆在空间上串联,第一个四级杆(q1)的主要作用是根据设定的质荷比范围扫描并选择出待检的五种lpc类物质的离子(在第一个四...
Natural organic matter (NOM) in water during its separation using ultra-performance liquid chromatography (UPLC) combined with electrospray ionization-triple quadruple mass spectrometry (ESI-tQMS). Galactans derived from potato pectin during their analysis using GPC. ...
采用 UPLC-Q-TOF/MS 定性分析黄芩酒炙前 后化学成分,利用 UPLC-TQMS 对 2 种饮片中 11 种黄酮类成分(黄芩苷,黄芩素,汉黄芩苷,汉黄芩素,千层纸素 A,千 层纸苷,野黄芩苷,芹菜素,高车前素,木犀草苷,白杨素)进行定量分析,并以含量为变量进行多元统计分析.结果 建 立了黄芩片,酒黄芩的特征图谱,标定 9 ...
The LC–MS-2050 is a compact SQMS with a new dual-heated ion spray source (ESI+APCI). It has a mass accuracy of 0.05 Da, fast scanning up to 15,000 u/s, and fast polarity switching of 10 ms. The LC–MS instrument is compatible with LabSolution...
All MS experiments were conducted using an ESI source in negative ion electrospray mode with a 6410B TQMS (Agilent, USA). The optimal MS conditions were as follows: drying gas temperature, 300 °C; drying gas flow rate, 10 L/min; nebulizer gas pressure, 30 psi; sheath gas temperature, ...