title: Photodegradation kinetics and byproducts identification of the Aflatoxin B1 in aqueous medium by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry.
abstract: A photodegradation study of Aflatoxin B(1) (AFB(1)) in water solution was performed under UV irradiation at different AFB(1) initial concentrations and UV irradiation intensities. The effect of UV intensity on the AFB(1) photodegradation ratio is dominative, when compared with AFB(1) initial concentration. The photodegradation of AFB(1) was proved to follow first-order reaction kinetics (R(2) > or = 0.99). Three photodegradation products, i.e. P(1) (C(17)H(14)O(7)), P(2) (C(16)H(14)O(6)) and P(3) (C(16)H(12)O(7)), were identified on the basis of low mass error and high matching property by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF MS), and the degradation pathway was proposed. This study first reports the appearance of these photodegradation products and the proposed degradation pathway in aqueous media.
authors.affiliation: State Key Laboratory of Food Science and Safety, School of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, Jiangsu Province, PR China.
authors.forename: Ruijie
authors.initials: R
authors.lastname: Liu
authors.forename: Qingzhe
authors.initials: Q
authors.lastname: Jin
authors.forename: Guanjun
authors.initials: G
authors.lastname: Tao
authors.forename: Liang
authors.initials: L
authors.lastname: Shan
authors.forename: Jianhua
authors.initials: J
authors.lastname: Huang
authors.forename: Yuanfa
authors.initials: Y
authors.lastname: Liu
authors.forename: Xingguo
authors.initials: X
authors.lastname: Wang
authors.forename: Wenyue
authors.initials: W
authors.lastname: Mao
authors.forename: Shanshan
authors.initials: S
authors.lastname: Wang
mesh_terms: D016604:Aflatoxin B1 / Q000737:chemistry* / Q000378:metabolism / Q000528:radiation effects*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D007700:Kinetics; D013058:Mass Spectrometry / Q000379:methods*; D010782:Photolysis; D014466:Ultraviolet Rays; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D016604:Aflatoxin B1