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Rapid detection of aflatoxin B1, zearalenone and ochratoxin A in grains by thermal desorption dielectric barrier discharge ionization mass spectrometry
Analyst ( IF 3.6 ) Pub Date : 2024-08-22 , DOI: 10.1039/d4an00977k
Xiangxu Zhao 1 , Xiaokang Guan 1 , Qiao Lu 2 , Xiaowen Yan 1 , Renato Zenobi 3
Affiliation  

Dielectric barrier discharge ionization is increasingly used for rapid detection in ambient mass spectrometry, although more often for gaseous and highly volatile samples than for solids and liquids. In this project, we present a rapid and sensitive method for detecting mycotoxins and demonstrate its capability for the detection of aflatoxin B1, zearalenone, and ochratoxin A in food samples. Our method is based on thermal desorption coupled to dielectric barrier discharge ionization mass spectrometry (TD-DBDI-MS), which we show generates minimal interferences and produces almost exclusively molecular ions. We detected mycotoxins in various food samples, including corn, peanuts, millet, and rice. Our method has a linear dynamic range of 1 μg kg−1 to 100 μg kg−1 for all three mycotoxins and a limit of detection (LOD) of 0.31 μg kg−1, 0.28 μg kg−1 and 0.43 μg kg−1, respectively. It is simple, rapid, reduces the pretreatment steps and has significant potential for practical applications.

中文翻译:


热解吸介质阻挡放电电离质谱法快速检测谷物中黄曲霉毒素B1、玉米赤霉烯酮和赭曲霉毒素A



介质阻挡放电电离越来越多地用于环境质谱分析中的快速检测,但与固体和液体相比,更常用于气体和高挥发性样品。在该项目中,我们提出了一种快速、灵敏的霉菌毒素检测方法,并展示了其检测食品样品中黄曲霉毒素 B1、玉米赤霉烯酮和赭曲霉毒素 A 的能力。我们的方法基于热解吸与介质阻挡放电电离质谱 (TD-DBDI-MS) 的结合,我们证明该方法产生的干扰最小,并且几乎只产生分子离子。我们在各种食品样本中检测到霉菌毒素,包括玉米、花生、小米和大米。我们的方法对所有三种霉菌毒素的线性动态范围为 1 μg kg -1至 100 μg kg -1 ,检测限 (LOD) 为 0.31 μg kg -1 、0.28 μg kg -1和 0.43 μg kg -1 ,分别。该方法简单、快速,减少了预处理步骤,具有巨大的实际应用潜力。
更新日期:2024-08-22
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