Photodegradation kinetics and byproducts identification of the Aflatoxin B1 in aqueous medium by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry.
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.
Liu
Ruijie
R
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.
Jin
Qingzhe
Q
Tao
Guanjun
G
Shan
Liang
L
Huang
Jianhua
J
Liu
Yuanfa
Y
Wang
Xingguo
X
Mao
Wenyue
W
Wang
Shanshan
S
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
D014867:Water; D016604:Aflatoxin B1