Department of Chemistry, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran.
Physics Department, Faculty of Science, Yazd University, P.Box 89195_714, Yazd, Iran.
J Fluoresc. 2021 Mar;31(2):559-567. doi: 10.1007/s10895-020-02679-9. Epub 2021 Jan 19.
Paraquat is one of the most toxic materials widely applied in agriculture in most countries. In the present study, a simple, innovative and inexpensive nano biosensor which is based on a thioglycolic acid (TGA) - CdTe@CdS core-shell nanocrystals (NCs) to detect paraquat, is suggested. The NCs based biosensor shows a linear working range of 10-100 nM, and limited detection of 3.5 nM. The proposed sensor that has been well used for the detection and determination of paraquat in natural water samples is collected from corn field and a canal located near to the corn field yielding recoveries as high as 98%. According to our findings, the developed biosensor shows reproducibility and high sensitivity to determine paraquat in natural water samples in which the amount of paraquat has low levels. The suggested method is efficiently applied to paraquat determination in the samples of natural water that are collected from a tap water and a canal located near to the cornfield.
百草枯是大多数国家农业中广泛应用的最有毒物质之一。在本研究中，提出了一种简单、创新和廉价的纳米生物传感器，该传感器基于巯基乙酸（TGA）-CdTe@CdS 核壳纳米晶体（NCs）来检测百草枯。基于 NCs 的生物传感器显示出 10-100 nM 的线性工作范围和 3.5 nM 的有限检测限。该传感器已成功用于检测和测定来自玉米田和位于玉米田附近的运河的天然水样中的百草枯，回收率高达 98%。根据我们的发现，开发的生物传感器对天然水样中的百草枯具有重现性和高灵敏度，其中百草枯的含量较低。该方法有效地应用于自来水中和位于玉米田附近的运河中采集的天然水样中百草枯的测定。
