马拉硫磷
电极
检出限
电化学
材料科学
重复性
纳米技术
化学
色谱法
杀虫剂
农学
生物
物理化学
作者
Prachi Janjani,Upasana Bhardwaj,Madhu Agarwal,Ragini Gupta,H.S. Kushwaha
标识
DOI:10.1080/09593330.2023.2179946
摘要
An enzyme-free electrochemical approach for ultra-trace quantification of the organophosphate insecticide malathion is proposed in this study. It is premised on screen-printed carbon electrodes modified by the MIL-88B(Fe) metal–organic framework (MOF). A one-pot solvothermal method was used to synthesise MIL-88B(Fe). The surface modification of electrodes allowed for increased electroactive surface area and accelerated electron transport on the electrode. Inhibition in the redox signal of MIL-88B(Fe) was observed due to the affinity between metal centres of the MOF and the functional groups of malathion, leading to an accurate determination of malathion. The proposed sensor effectively quantified malathion in the wide concentration range of 1 × 10−12 M to 1 × 10−6 M. The limit of detection for malathion was 0.79 pM. The proposed sensor also possessed excellent stability, repeatability, and anti-interference characteristics. Furthermore, the proposed sensor demonstrated satisfactory malathion recovery in spiked vegetable samples.
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