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This paper, for the first time, reported a simple, rapid, sensitive and environmental friendly ultrasonic-assisted in situ derivatization-dispersive liquid–liquid microextraction (in situ UAD-DLLME) method followed by ultra high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) for the simultaneous determination of dopamine (DA), serotonin (5-HT) and their biosynthesis precursors...
Wu-tou decoction (WTD), a traditional Chinese medicine (TCM) formula, is composed of Aconiti Radix Cocta, Ephedrae Herba, Paeoniae Radix Alba, Astragali Radix and Glycyrrhiza Radix Preparata, and it has been used for more than a thousand years to treat rheumatic arthritis, rheumatoid arthritis and pain of joints, while the active constitutions of WTD are unclear. In this research, an ultra performance...
In this work, the glucose-containing disaccharide isomers were studied using negative electrospray ionization tandem mass spectrometry (ESI-MS/MS). Interestingly, the full-scan mass spectra of the disaccharides revealed that the deprotonated dimers were the predominant gas phase ions during ionization process. Importantly, several diagnostic fragment ions relative to linkage positions and anomeric...
A fingerprinting approach was developed by means of UPLC–ESI/MS n (ultra-performance liquid chromatography–electrospray ionization/mass spectrometry) for the quality control of processed Radix Aconiti, a widely used toxic traditional herbal medicine. The present fingerprinting approach was based on the two processing methods recorded in Chinese Pharmacopoeia for the purpose of reducing the...
The principal components, isoflavonoids and astragalosides, in the extract of Radix Astragali were detected by a high-performance liquid chromatography couple to electrospray ionization ion trap multiple-stage tandem mass spectrometry (HPLC-ESI-IT-MS n ) method. By comparing the retention time (t R ) of HPLC, the ESI-MS n data and the structures of analyzed compounds with the...
Studies of aconitine-type alkaloids in the Chinese herb Aconitum Carmichaeli were performed by HPLC/ESIMS/MS n and FTICR/ESIMS in positive ion mode. The characteristic fragmentation pathways in the MS n spectra were summarized based on previously published research literature and further study. According to the fragmentation pathways of mass spectrometry, results from the analysis...
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