Abstract

Thiabendazole (TBZ), a widely used agricultural antifungal, has been evidenced to pose serious threat to human health. However, highly sensitive detection of it in food samples is difficult owing to the complexity of food matrix. Herein, an electrochemical sensor, based on multiwall carbon nanotubes (MWCNTs) decorated two-dimensional layered molybdenum disulfide (MoS₂), was firstly developed for rapid detection of TBZ using square wave voltammetry method. It is demonstrated that the modification of MoS₂ with MWCNTs enhances the catalytic performance to TBZ oxidation. Under optimized conditions, the electrochemical sensor shows admirable linearity range, high selectivity and low detection limit. In pear, water spinach and tap water sample analyses, satisfactory recoveries from 92.83 to 101.92% with coefficients of variation less than 5% were obtained, showing high consistence with the HPLC results. This work puts forward a rapid and reliable method for the highly sensitive screening of the residues of TBZ in food resource.

中文翻译：

---

基于多壁碳纳米管修饰的二维层状二硫化钼的食品样品中噻菌灵残留物的高灵敏检测

摘要

噻苯达唑（TBZ）是一种广泛使用的农业抗真菌剂，已被证明对人类健康构成严重威胁。然而，由于食物基质的复杂性，很难对食物样品中的它进行高灵敏度的检测。在此，基于方波伏安法快速开发基于多壁碳纳米管（MWCNTs）的二维二维层状二硫化钼（MoS ₂）的电化学传感器，用于快速检测TBZ。证明了MoS ₂的修饰MWCNTs可以增强TBZ氧化的催化性能。在最佳条件下，电化学传感器显示出令人赞叹的线性范围，高选择性和低检测限。在梨，菠菜和自来水样品分析中，回收率从92.83％提高到101.92％，变异系数小于5％，与HPLC结果高度吻合。这项工作提出了一种快速，可靠的方法，用于高灵敏度地筛选食品资源中的TBZ残留。