Hu Hui, Wu Si, Wang Cheng, Wang Xiaohui, Shi Xiaowen
School of Resource and Environmental Science, Hubei Engineering Center of Natural Polymers-Based Medical Materials, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, Wuhan University Wuhan 430079 China
College of Resources and Environmental Engineering, Hubei Key Laboratory for Efficient Utilization and Agglomeration of Metallurgic Mineral Resources, Wuhan University of Science and Technology Wuhan 430081 China.
RSC Adv. 2023 Jan 10;13(3):1867-1876. doi: 10.1039/d2ra07662d. eCollection 2023 Jan 6.
Amitrole is a non-selective triazole herbicide that is widespread used to control a variety of weeds in agriculture, but it may pollute the environment and do harm to organisms. Thus, it is of critical significance to enlist a low-cost, sensitive, stable and renewable method to detect amitrole. In this paper, electrochemical experiments were carried out using carbon fibers/reduced graphene oxide/cellulose paper electrodes, which demonstrated good electrocatalytic performance for amitrole detection. The electrochemical process of amitrole on the surface of the reduced paper electrode was a quasi-reversible reaction controlled by diffusion. Cyclic voltammetry and the amperometric - curve method were used for amitrole determination at a micro molar level and higher-concentration range with the following characteristics: linear range 5 × 10 mol L to 3 × 10 mol L, detection limit 2.44 × 10 mol L. In addition, the relative standard deviation of repeatability is 3.74% and of stability is 4.68%. The reduced paper electrode with high sensitivity, low detection limit, good stability and repeatability provides novel ideas for on-site amitrole detection in food and agriculture.
杀草强是一种非选择性三唑类除草剂，在农业中广泛用于控制各种杂草，但它可能会污染环境并对生物造成危害。因此，寻求一种低成本、灵敏、稳定且可再生的杀草强检测方法至关重要。本文采用碳纤维/还原氧化石墨烯/纤维素纸电极进行电化学实验，该电极对杀草强检测表现出良好的电催化性能。杀草强在还原纸电极表面的电化学过程是受扩散控制的准可逆反应。采用循环伏安法和安培曲线法在微摩尔水平及更高浓度范围内测定杀草强，具有以下特点：线性范围为5×10⁻⁶mol/L至3×10⁻⁴mol/L，检测限为2.44×10⁻⁶mol/L。此外，重复性相对标准偏差为3.74%，稳定性相对标准偏差为4.68%。这种具有高灵敏度、低检测限、良好稳定性和重复性的还原纸电极，为食品和农业中杀草强的现场检测提供了新思路。
