Abstract A novel, simple and sensitive fenitrothion (FT) s ensor was developed based on as-synthesized peptide nanotubes (PNTs) on modified pencil graphite electrode (PGE). This modified electrode (PNT/PGE) was characterized by SEM, electrochemical impedance spectroscopy and cyclic voltammetry techniques. The electrochemical response of the PNT/PGE was linearly proportional to the concentration of FT over the range of 0.114 μM to 1.712 μM with a lower detection limit of 0.0196 μM (S/N = 3). The sensor was also applied for the detection of fenitrothion in tap water. The recoveries for the spiked water samples were between 94.9 and 103.6%. The results mentioned above show that the novel electrochemical sensor is an ideal device for FT determination.

中文翻译：

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基于自组装肽-纳米管修饰一次性铅笔石墨电极的杀螟虫农药的灵敏电化学检测

摘要 基于在改性铅笔石墨电极（PGE）上合成的肽纳米管（PNT），开发了一种新型、简单且灵敏的杀螟（FT）传感器。这种改性电极 (PNT/PGE) 通过 SEM、电化学阻抗谱和循环伏安法技术进行表征。PNT/PGE 的电化学响应在 0.114 μM 至 1.712 μM 的范围内与 FT 的浓度成线性比例，检测下限为 0.0196 μM（S/N = 3）。该传感器还用于检测自来水中的杀螟。加标水样的回收率介于 94.9% 和 103.6% 之间。上述结果表明，新型电化学传感器是一种理想的 FT 测定装置。