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Determination of nereistoxin-related insecticide via quantum-dots-doped covalent organic frameworks in a molecularly
Ying Zhang1, Xinyue Yuan1, Wei Jiang1
1Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University (BTBU), No. 11 Fucheng Road, Beijing, 100048, People's Republic of China.
Abstract:
Quantum-dots-doped covalent organic frameworks in a molecularly imprinted network (QDs-doped COFs@MIP) were developed for detection of nereistoxin (NRT)-related insecticide in tap water. The preparation of QDs-doped COFs@MIP was easy to accomplish via one-pot synthesis at room temperature. QDs-doped COFs@MIP quenched by targeting thiosultap due to the photoinduced charge transfer. A Brunauer-Emmett-Teller surface area of 186.20 m2 g-1 and a maximum adsorption capacity of 771 mg g-1 of the QDs-doped COFs@MIP exhibited good selectivity and adsorption capacity. Direct fluorescence determination was established over the range 5-100 μg L-1 (R2 = 0.9959) with a detection limit of 1.60 μg L-1. Furthermore, 86.5-106.5% recoveries of spiked tap water were achieved. The determination system was feasible for tracing the NRT-related insecticide with high accuracy and good repeatability and reproducibility. Graphical abstract .
