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首页> 外文期刊>Journal of mass spectrometry: JMS >Photodegradation kinetics and byproducts identification of the Aflatoxin B-1 in aqueous medium by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry
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Photodegradation kinetics and byproducts identification of the Aflatoxin B-1 in aqueous medium by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry

机译：超高效液相色谱-四极杆飞行时间质谱在水介质中黄曲霉毒素B-1的光降解动力学和副产物鉴定

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摘要

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 = 0.99). Three photodegradation products, i.e. P-1 (C17H14O7), P-2 (C16H14O6) and P-3 (C16H12O7), were identified on the basis of low mass error and high matching property by ultra-performance liquid chromatography -quaclrupole 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.
机译：黄曲霉毒素B-1（AFB（1））在不同的AFB（1）初始浓度和紫外线照射强度的紫外线照射下进行了光降解研究。与AFB（1）的初始浓度相比，UV强度对AFB（1）的光降解率的影响最为明显。证明AFB（1）的光降解遵循一级反应动力学（R-2 = 0.99）。通过超高效液相色谱-四极杆时间-低质量误差和高匹配性，鉴定出三种光降解产物，分别为P-1（C17H14O7），P-2（C16H14O6）和P-3（C16H12O7）。飞行质谱（UPLC-Q-TOF MS），并提出了降解途径。这项研究首先报告了这些光降解产物的外观以及在水性介质中建议的降解途径。

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