A portable electrode with usability, availability, and high-sensitivity is of great significance for effective on-site detection in practical situations. In this paper, a novel flexible, disposable sensor for Cd²⁺ and Pb²⁺ with ultrahigh sensitivity and a fast response, based on acid-etched Fe/Fe₂O₃ encapsulated into a disposable carbon cloth electrode, has been successfully fabricated. Differential pulse anode stripping voltammetry (DPASV) was used to investigate the stripping behavior of Cd²⁺ and Pb²⁺, achieving high sensitivity for Cd²⁺ and Pb²⁺ (338.7 and 408.0 μA mM⁻¹ cm⁻²) with limits of detection (LODs) of 0.42 ppb and 0.50 ppb, respectively. Meanwhile, remarkable stability and reproducibility were obtained. Such an electrode can detect Cd²⁺ and Pb²⁺ in actual water samples so this is a good candidate to act as a simple and convenient sensor for general applications. More importantly, the novel disposable electrode exhibited the unique advantages of convenience, portability, and reliability compared to a conventional electrode, which may make it an alternative advantageous choice for practical on-site detection.

中文翻译：

---

酸蚀后的Fe / Fe2O3纳米颗粒封装在碳布中，作为新型伏安传感器，用于同时检测Cd2 +和Pb2

具有实用性，可用性和高灵敏度的便携式电极对于实际情况下的有效现场检测具有重要意义。在本文中，已经成功地制造了一种新型的，柔性的，用于Cd ²⁺和Pb ^2+的一次性传感器，该传感器基于封装在一次性碳布电极中的酸蚀Fe / Fe ₂ O ₃，具有超高灵敏度和快速响应。差分脉冲阳极溶出伏安法（DPASV）用于研究Cd ²⁺和Pb ²⁺的溶出行为，实现了对Cd ²⁺和Pb ^2+的高灵敏度（338.7和408.0μAmM ^-1 cm ^-2））的检出限（LOD）分别为0.42 ppb和0.50 ppb。同时，获得了显着的稳定性和可重复性。这种电极可以检测实际水样中的Cd ²⁺和Pb ²⁺，因此，它是用作一般应用中简单便捷的传感器的理想选择。更重要的是，与常规电极相比，新型一次性电极展现出便利性，便携性和可靠性的独特优势，这可能使其成为实际现场检测的替代优势选择。