双模板印制聚合物电化学传感器,用于使用石墨烯量子点同时测定马拉和碳化
Fariba Beigmoradi1, Masoud Rohani Moghadam1, Zahra Garkani-Nejad2
1Department of Chemistry, Faculty of Sciences, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran. masoud.rohani.moghadam@gmail.com.
Analytical methods : advancing methods and applications
|September 23, 2023
概括
这项研究开发了一种新型的双重传感器,用于同时检测马拉 (MAL) 和碳糖 (CBZ) 农药. 具有成本效益的石墨环氧复合电极为现实世界样本分析提供了高灵敏度和稳定性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 马拉 (MAL) 和碳达 (CBZ) 是已知有毒作用的广泛使用的农药.
- 同时检测MAL和CBZ对于农业和环境监测中的风险评估至关重要.
- 现有的检测方法可能缺乏广泛应用所需的灵敏度,选择性或成本效益.
研究的目的:
- 设计和制造一个双模板电化学传感器,用于同时检测MAL和CBZ.
- 使用一个具有成本效益的石墨环氧复合电极 (GECE) 用石墨烯量子点 (GQDs) 和分子印记聚合物 (MIPs) 进行修改.
- 在真实样本中验证传感器的性能,并评估其稳定性和抗干扰能力.
主要方法:
- 用MAL和CBZ作为模板,合成GQD及其随后的MIP涂层.
- 用GQDs@MIP进行修改的GECE的制造.
- 优化传感器参数,包括GQD@MIP百分比,pH和化时间,并对pH进行DFT验证.
- 使用FTIR,FESEM和XRD对修改过的电极的表征.
- 同时检测MAL和CBZ使用微分脉冲电压计 (DPV).
主要成果:
- 开发的传感器显示了MAL (0.02-55.00μM,LOD 2nM) 和CBZ (0.02-45.00μM,LOD 1nM) 的线性反应.
- 传感器表现出卓越的长期稳定性和抗干扰能力.
- 在分析真实样本时获得了良好的回收值,表明了实际适用性.
结论:
- 修改为GQD-MIP的GECE为同时检测MAL和CBZ提供了一个灵敏,有选择性和具有成本效益的平台.
- 传感器在真实样本中的性能突显了其在环境和农业监测方面的潜力.
- 这种双重电化学传感器代表了农药检测技术的重大进步.
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