Department of Chemistry, Government Nagarjuna Post Graduate College of Science, Raipur, CG 492010, India.
School of Studies in Chemistry, Pt. Ravishanakar Shukla University, Raipur 492010, CG, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2023 Oct 15;299:122824. doi: 10.1016/j.saa.2023.122824. Epub 2023 May 9.
The increasing use of pesticides in the agriculture fields strengthen the crop production to meet the needs of increasing population. The residues in water and food materials cause several health hazards. Herein, nitrogen-doped carbon quantum dot (N-CQDs) is designed for determination of methiocarb pesticide in vegetables by fluorescent paper sensor and compared the results with fluorimetry. The fluorescent paper-based detection is performed by recording the change in fluorescence of N-CQDs with introduction of methiocarb using smartphone and ImageJ software. Good linear range was acquired for analysis of methiocarb from 10 to 1000 μgL with a low detection limit (LOD) of 3.5 μgL in fluorimetry; and 700-10,000 μgL with a LOD of 500 μgL in fluorescent paper sensor. A better recovery from 92.0 to 95.4% illustrating the selectivity of both methods for analysis of methiocarb in vegetables. Thus, the advantage of using N-CQDs as a fluorescent sensor for analysis of methiocarb in vegetables is instrument free, portable and user-friendly.
农业领域中杀虫剂使用的增加增强了作物生产能力，以满足不断增长的人口需求。这些残留物在水和食物材料中会造成多种健康危害。在此，设计了氮掺杂碳量子点（N-CQDs），通过荧光纸质传感器用于测定蔬菜中甲拌磷农药，并与荧光法进行了比较。通过智能手机和 ImageJ 软件记录引入甲拌磷后 N-CQDs 荧光强度的变化来进行基于荧光纸的检测。在荧光法中，分析甲拌磷的线性范围为 10 至 1000 μgL，检测限（LOD）为 3.5 μgL；在荧光纸质传感器中，线性范围为 700 至 10,000 μgL，LOD 为 500 μgL。在蔬菜中甲拌磷的分析中，两种方法的回收率均在 92.0%至 95.4%之间，这表明了这两种方法的选择性。因此，使用 N-CQDs 作为荧光传感器分析蔬菜中甲拌磷的优点是无需仪器、便携且易于使用。
