Ozer Tugba, Agir Ismail, Borch Thomas
Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, 34220 Istanbul, Türkiye.
Department of Chemistry, Colorado State University, 1170 Campus Delivery, Fort Collins, CO 80523, USA.
Analyst. 2024 Apr 29;149(9):2671-2679. doi: 10.1039/d4an00055b.
Low-power and smart sensing systems for iron detection are necessary for monitoring of water quality. Here, a potentiometric Fe-selective electrode (ISE) was fabricated based on cyanomethyl -methyl--phenyl dithiocarbamate for the first time as an ionophore. Under optimal conditions, the ISE showed a Nernstian slope of 29.76 ± 0.6 mV per decade for Fe ions over a wide concentration range from 1.0 × 10 to 1.0 × 10 M with a lower detection limit (LOD) of 1.0 × 10 M. The ISE interference of various cations on the potentiometric response was also investigated. The ISE had a response time less than 3 s and the lifetime was two months. Also, an automated, long-range (LoRa), wireless enabled sampling microfluidic device powered with a solar panel as an autonomous power source was developed for a continuous sampling and sensing process. The sensing platform was employed in the determination of Fe in acid mine drainage and spiked water samples with an average recovery of 100.7%. This simple, inexpensive (below $350), portable sensing platform will allow for rapid real-time monitoring of ground-, drinking-, and industrial waters contaminated with iron.
用于铁检测的低功耗智能传感系统对于水质监测至关重要。在此，首次基于氰甲基 - 甲基 - 苯基二硫代氨基甲酸盐作为离子载体制备了电位型铁选择性电极（ISE）。在最佳条件下，该ISE在1.0×10至1.0×10 M的宽浓度范围内对铁离子显示出每十倍浓度变化29.76±0.6 mV的能斯特斜率，检测下限（LOD）为1.0×10 M。还研究了各种阳离子对ISE电位响应的干扰。该ISE响应时间小于3秒，寿命为两个月。此外，还开发了一种由太阳能电池板作为自主电源供电的自动化、远程（LoRa）、无线采样微流控装置，用于连续采样和传感过程。该传感平台用于测定酸性矿山排水和加标水样中的铁，平均回收率为100.7%。这种简单、廉价（低于350美元）的便携式传感平台将能够对受铁污染的地表水、饮用水和工业用水进行快速实时监测。
