Department of Civil and Environment Engineering, University of Cincinnati, Cincinnati, USA.
Talanta. 2010 Nov 15;83(1):1-8. doi: 10.1016/j.talanta.2010.07.061. Epub 2010 Aug 7.
Due to their toxicity to humans and animals, heavy metals and nitrate in groundwater are of particular concern. The combination of high toxicity and widespread occurrence has created a pressing need for effective monitoring and measurement of nitrate and heavy metals in soil pore water and groundwater at shallow depths. In this work, a new electrochemical sensing platform with the self-assembly nanobeads-packed (nBP) hetero columns has been developed for the pH and nitrate measurements. In addition, for on-site determination of cadmium (Cd(II)), a bismuth (Bi(III)) based polymer lab chip sensor using the square-wave anodic stripping voltammetry (SWASV) sensing principle has been designed, fabricated and successfully characterized. Factors affecting sensitivity and precision of the sensor, including deposition potential and deposition time, were studied. Miniaturized electrochemical lab chip sensors could be very valuable in environmental monitoring area due to their many benefits, such as greatly reduced sensing cost, sensing system portability, and ease of use.
由于其对人类和动物的毒性，地下水的重金属和硝酸盐尤其令人关注。高毒性和广泛存在的结合，迫切需要对浅层土壤孔隙水和地下水中的硝酸盐和重金属进行有效监测和测量。在这项工作中，开发了一种具有自组装纳米珠填充（nBP）异质柱的新型电化学传感平台，用于 pH 值和硝酸盐的测量。此外，为了现场测定镉（Cd(II)），设计、制造和成功表征了一种基于铋（Bi(III)）的聚合物实验室芯片传感器，使用方波阳极溶出伏安法（SWASV）传感原理。研究了影响传感器灵敏度和精度的因素，包括沉积电位和沉积时间。由于具有许多优点，例如大大降低了传感成本、传感系统的便携性和易用性，小型化电化学实验室芯片传感器在环境监测领域非常有价值。
