Detection system for detecting T-2 toxin residue, and preparation method and application thereof

The invention discloses a detection system for detecting T-2 toxin residue, and a preparation method and application thereof. The detection system comprises a two-dimensional sheet metal organic framework and an aptamer with the two tail ends marked with fluorescein, and the two-dimensional sheet metal organic framework is a copper-based metal organic framework serving as a quencher; and the aptamer with fluorescein marked at the two tail ends is used as a fluorescent probe. The preparation method is simple, raw materials are easy to obtain, the cost is low, and large-scale production is easy. The prepared detection system for detecting T-2 toxin residue is high in sensitivity, has high selectivity and specificity, only has fluorescence response to T-2, and does not react to other mycotoxins and interfering substances. The detection system for detecting the T-2 toxin residue, prepared by the invention, can effectively and quantitatively detect the T-2 toxin residue, is more efficient, cost-saving and more acc