Abstract：
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 Cu2+ 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.
摘要：
农药的同时和高性能检测仍然是一个相当大的挑战和迫切需要。在这里，已经开发了基于双发射碳点（CD）的非酶荧光传感平台，在同时检测对硫磷（MP）和草甘膦方面显示出优异的灵敏度和选择性。通过对桑叶和氢氧化钠进行水热处理，制备了具有440nm（bCD）和660nm（rCD）发射的CD。bCDs通过内部过滤效应对水解MP的反应，而rCDs通过静态猝灭作用在Cu2+的辅助下感知草甘膦。发现MP（0.3-65.0μM）和草甘膦（1.0-110.0μM）具有良好的线性相关性，检出限为0.14和0.60μM。值得注意的是,提出的双通道策略成功地应用于同时检测MP和草甘膦在食品/草药样品与可接受的回收率，精度好,和高选择性。此外，实现了对食物的估计，草药,或环境安全。
