Institute of Chinese Materia Medica, Hunan University of Chinese Medicine, Changsha 410013, Hunan, China; College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China.
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China.
Food Chem. 2023 Mar 1;403:134346. doi: 10.1016/j.foodchem.2022.134346. Epub 2022 Sep 21.
Simultaneous and high-performance detection of pesticides is still a considerable challenge and urgent need. Herein, a dual-emission carbon dots (CDs)-based nonenzymatic fluorescent sensing platform has been developed, which shows excellent sensitivity and selectivity in simultaneously detecting parathion-methyl (MP) and glyphosate. CDs with emissions at 440 nm (bCDs) and 660 nm (rCDs) were prepared by hydrothermal treatment of mulberry leaves and sodium hydroxide. bCDs response to hydrolyzed MP via inner filter effect, while rCDs sense glyphosate with the aid of Cu by static quenching effect. Excellent linear correlations were found for MP (0.3-65.0 μM) and glyphosate (1.0-110.0 μM) with limits of detection at 0.14 and 0.60 μM. Notably, the presented dual-channel strategy was successfully applied in simultaneously detecting MP and glyphosate in food/herbal samples with acceptable recoveries, good precision, and high selectivity. Moreover, an ORlogicgatewas achieved for estimating food, herbal, or environmental safety.
同时、高灵敏度地检测农药仍然是一个具有相当挑战性和紧迫性的需求。在此，我们开发了一种基于双发射碳点（CDs）的非酶荧光传感平台，该平台在同时检测对硫磷（MP）和草甘膦方面表现出优异的灵敏度和选择性。通过桑树叶和氢氧化钠的水热处理，制备了发射峰位于 440nm（bCDs）和 660nm（rCDs）的 CDs。bCDs 通过内滤效应响应水解的 MP，而 rCDs 在 Cu 的辅助下通过静态猝灭效应感应草甘膦。对于 MP（0.3-65.0μM）和草甘膦（1.0-110.0μM），发现了优异的线性相关性，检测限分别为 0.14 和 0.60μM。值得注意的是，所提出的双通道策略成功应用于同时检测食品/草药样品中的 MP 和草甘膦，具有可接受的回收率、良好的精密度和高选择性。此外，还实现了用于评估食品、草药或环境安全性的或逻辑门。
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