Wang Yuekun, Xu Yuhao, Jiang Jinhua, Li Yang, Tong Jianhua, Bian Chao
State Key Laboratory of Transducer Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China.
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
Micromachines (Basel). 2021 Nov 28;12(12):1468. doi: 10.3390/mi12121468.
In this study, an ultramicro interdigital electrode array chip (UIEA) was designed and fabricated by using Micro-Electro-Mechanical systems (MEMS) technology, and a portable detection system, using the chip for determination of heavy-metal ions in water, was developed. The working electrode of the UIEA was modified with gold nanoparticles by electrodeposition. The detection sensitivity of the UIEA chip for copper ions was 0.0138 μA·L·μg, with the linear range of 0-400 μg/L and the detection limit of 18.89 μg/L (3σ), which was better than that of the compared columnar glassy carbon electrode. The results of the interference experiment verified that the UIEA chip has a certain anti-interference ability against common heavy-metal ions in water, such as Pb, Zn, and Mg ions. The standard addition method was used to investigate the performance of the developed s ystem for copper ion determination in real water. The recovery range from 87.5% to 94.7% was achieved.
在本研究中，采用微机电系统（MEMS）技术设计并制作了一种超微叉指电极阵列芯片（UIEA），并开发了一种使用该芯片测定水中重金属离子的便携式检测系统。通过电沉积法用金纳米粒子修饰UIEA的工作电极。UIEA芯片对铜离子的检测灵敏度为0.0138 μA·L·μg，线性范围为0 - 400 μg/L，检测限为18.89 μg/L（3σ），优于所比较的柱状玻碳电极。干扰实验结果证实，UIEA芯片对水中常见重金属离子如Pb、Zn和Mg离子具有一定的抗干扰能力。采用标准加入法研究了所开发系统对实际水样中铜离子的测定性能，回收率范围为87.5%至94.7%。
