AbstractCarbon nanotubes (CNTs) have been studied as an electrochemical recognition element for the impedimetric determination of priority polycyclic aromatic hydrocarbons (PAHs) in water, using hexocyanoferrate as a redox probe. For this goal, an indium tin oxide (ITO) electrode functionalized with a silane-based self-assembled monolayer carrying CNTs has been engineered. The electroanalytical method, which is similar to an antibody-antigen assay, is straightforward and exploits the high CNT–PAH affinity obtained via π–interactions. After optimizing the experimental conditions, the resulting CNT-based impedimetric recognition platform exhibits ultra-low detection limits (1.75 ± 0.04 ng·L−1) for the sum of PAHs tested, which was also validated by using a certified reference PAH mixture. Graphical abstractSchematic of an indium-tin-oxide (ITO) electrode functionalized with a silane-based self-assembled monolayer carrying carbon nanotubes (CNTs) as a recognition platform for the ultra-low determination of total polycyclic aromatic hydrocarbons (PAHs) in water via π–interactions using Electrochemical Impedance Spectroscopy (EIS).

中文翻译：

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富碳纳米管阻抗识别电极超低测定水中多环芳烃的研究

摘要 碳纳米管 (CNT) 作为电化学识别元件被研究用于阻抗测定水中优先多环芳烃 (PAH)，使用六氰基铁酸盐作为氧化还原探针。为了这个目标，已经设计了一种用带有碳纳米管的基于硅烷的自组装单层功能化的氧化铟锡 (ITO) 电极。电分析方法类似于抗体-抗原测定，简单明了，利用了通过 π-相互作用获得的高 CNT-PAH 亲和力。在优化实验条件后，所得的基于 CNT 的阻抗识别平台对所测试的多环芳烃总和表现出超低检测限 (1.75 ± 0.04 ng·L-1)，这也通过使用有证参考多环芳烃混合物进行了验证。