title: Detection, characterization and identification of phenolic acids in Danshen using high-performance liquid chromatography with diode array detection and electrospray ionization mass spectrometry.
abstract: By using HPLC-diode array detection-electrospray ion trap tandem mass spectrometry (HPLC-DAD-ESI-MS(n)) in negative ion mode, we have analyzed the fragmentation pathways of 11 phenolic acids which were isolated from Danshen. Then the extract of Danshen was analyzed, and a total of 42 phenolic acids, including sixteen new minor constituents, were identified or tentatively identified for the first time. A new solid-phase extraction (SPE) method, new HPLC separation method, new liquid chromatography (LC)-MS and LC-MS(n) (n=3-5) data and proposed fragmentation pathways, LC retention time for phenolic acids are reported.
authors.affiliation: The State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Beijing 100083, China.
authors.forename: Ai-Hua
authors.initials: AH
authors.lastname: Liu
authors.forename: Hui
authors.initials: H
authors.lastname: Guo
authors.forename: Min
authors.initials: M
authors.lastname: Ye
authors.forename: Yan-Hua
authors.initials: YH
authors.lastname: Lin
authors.forename: Jiang-Hao
authors.initials: JH
authors.lastname: Sun
authors.forename: Man
authors.initials: M
authors.lastname: Xu
authors.forename: De-An
authors.initials: DA
authors.lastname: Guo
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D012015:Reference Standards; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*; D053719:Tandem Mass Spectrometry / Q000379:methods