title: Rapid screening and identification of the antioxidants in Hippocampus japonicus Kaup by HPLC-ESI-TOF/MS and on-line ABTS free radical scavenging assay.
abstract: In this paper, a method based on HPLC coupled with ESI-TOF/MS and on-line to a stable free radical scavenging detection system has been developed to rapidly screen and identify the major antioxidants in the water extract of Hippocampus japonicus Kaup, a kind of marine medicinal organism. The developed on-line stable free radical scavenging detection method of water extract from H. japonicus Kaup revealed the presence of three radical scavenging compounds, which were simultaneously identified as hypoxanthine, phenylalanine and tryptophane by high-resolution TOF-MS. To the best of our knowledge, it is original to demonstrate the rapid and successful use of HPLC-ESI-TOF/MS and on-line 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonate) diammonium salt free radical scavenging assay to directly and simultaneously screen and identify the antioxidants in the water extracts of H. japonicus Kaup without any purification. The present method provides a useful improvement on the reducing of workload and a powerful tool for rapid screening and identification of free radical scavenging compounds in complex natural products.
authors.affiliation: Qingdao Key Lab of Analytical Technology Development and Standardization of Chinese Medicines, First Institute Oceanography of SOA, Qingdao, P. R. China. chen2000junhui@hotmail.com
authors.forename: Junhui
authors.initials: J
authors.lastname: Chen
authors.forename: Hengqiang
authors.initials: H
authors.lastname: Zhao
authors.forename: Qian
authors.initials: Q
authors.lastname: Shi
authors.forename: Daolai
authors.initials: D
authors.lastname: Zhang
authors.forename: Hongyan
authors.initials: H
authors.lastname: Cheng
authors.forename: Xiaoru
authors.initials: X
authors.lastname: Wang
authors.forename: Frank Sen-Chun
authors.initials: FS
authors.lastname: Lee
mesh_terms: D000975:Antioxidants / Q000032:analysis; D002851:Chromatography, High Pressure Liquid / Q000295:instrumentation / Q000379:methods; D016166:Free Radical Scavengers / Q000032:analysis*; D008386:Marine Biology; D008516:Medicine, Chinese Traditional; D019906:Nuclear Magnetic Resonance, Biomolecular; D021241:Spectrometry, Mass, Electrospray Ionization / Q000295:instrumentation / Q000379:methods
chemical_list: D000975:Antioxidants; D016166:Free Radical Scavengers