Abstract

Fluorescent chemical sensors to detect materials, by increasing fluorescence emission and absorption or by shutting down, because they are nondestructive, the ability to show decomposed concentrations, fast response, high accuracy have been considered and used. In this research, a chemical sensor was synthesized PbS functionalized with gelatin quantum dots for the determination of toxic bentazon (BTZN) one of the most problematic pesticides polluting in water samples, and extremely harmful to humans and animals even at low concentrations. The calibration curve was linear in the range of (0.05 to 200.0 ng mL⁻¹). The current response was linearly proportional to the BTZN concentration with a R²∼ 0.999. The standard deviation of less than (3%), and detection limits (3S/m) of the method (0.5 ng mL⁻¹, in time 50 s, 325 nm) were obtained for sensor level response PbS Quantum Dot–Gelatin nanocomposites sensor with (99%) which is below the U.S. Health Advisory level. The observed outcomes confirmed the suitability recovery and a very low detection limit for measuring the BTZN. The method fluorometric introduced to measure BTZN in water samples was used and can be used for in different intricate matrices, the chemical PbS Quantum Dot–Gelatin nanocomposites sensor made it possible as an excellent sensor with good reproducibility.

摘要

通过增加荧光发射和吸收或通过关闭来检测材料的荧光化学传感器，因为它们是无损的，所以已经考虑和使用了显示分解浓度、快速响应、高精度的能力。在这项研究中，合成了一种用明胶量子点功能化的 PbS 化学传感器，用于测定有毒苯达松 (BTZN)，它是水样中污染最严重的农药之一，即使在低浓度下也对人类和动物极为有害。校准曲线在 (0.05 至 200.0 ng mL ^-1 ) 范围内呈线性。电流响应与 BTZN 浓度呈线性比例，R ²～ 0.999。对于传感器水平响应 PbS 量子点-明胶纳米复合材料传感器，获得了小于 (3%) 的标准偏差和方法的检测限 (3S/m)（0.5 ng mL ^-1 ，时间 50 s，325 nm） (99%) 低于美国健康咨询水平。观察到的结果证实了测量 BTZN 的适用性恢复和非常低的检测限。采用荧光法测量水样中的 BTZN，可用于不同的复杂基质，化学 PbS 量子点-明胶纳米复合材料传感器使其成为具有良好重现性的优秀传感器。