A photodegradation study of Aflatoxin B1 (AFB1) in water solution was performed under UV irradiation at different AFB1 initial concentrations and UV irradiation intensities. The effect of UV intensity on the AFB1 photodegradation ratio is dominative, when compared with AFB1 initial concentration. The photodegradation of AFB1 was proved to follow first-order reaction kinetics (R2 ≥ 0.99). Three photodegradation products, i.e. P1 (C17H14O7), P2 (C16H14O6) and P3 (C16H12O7), 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. Copyright © 2010 John Wiley & Sons, Ltd.
在不同的
黄曲霉毒素 B1 初始浓度和紫外线照射强度下,对
水溶液中的
黄曲霉毒素 B1(AFB1)进行了紫外线照射下的光降解研究。与 AFB1 的初始浓度相比,紫外线强度对 AFB1 光降解率的影响较大。事实证明,AFB1 的光降解遵循一阶反应动力学(R2 ≥ 0.99)。通过超高效
液相色谱-四极杆飞行时间质谱(
UPLC-Q-TOF MS)鉴定了三种光降解产物,即 P1(
C17H14O7)、P2(
C16H14O6)和 P3(
C16H12O7),其质量误差小,匹配度高,并提出了降解途径。本研究首次报道了这些光降解产物的出现以及在
水介质中的降解途径。Copyright © 2010 John Wiley & Sons, Ltd. All Rights Reserved.