The electrochemical determination of copper (II), lead (II) and mercury (II) ions has been studied and analyzed in this paper. Preparation of polyaniline functional ink by electronic ink technology was proposed. Screen-printed carbon electrode (SPCE) modified by ethylene diamine tetraacetic acid @ polyaniline/multi-walled carbon nanotube nanocomposite structure was used as an electrochemical sensor by all-printed technology to selectively detect copper, lead and mercury ions. The improved electrode is a great improvement in process simplicity and practicability. Square-wave voltammetry was used to detect the concentration of copper, lead and mercury ions, and the selectivity, sensitivity, reproducibility and stability of the ions were also studied. The detection results show that the modified SPCE electrode has high selectivity, sensitivity and reproducibility. The detection limit of copper ions was determined as 55.4 pM, that of lead ions was 22 pM, and that of mercury ions was 17.8 pM.

本文研究并分析了电化学测定铜（II），铅（II）和汞（II）离子的方法。提出了利用电子墨水技术制备聚苯胺功能墨水的方法。采用乙二胺四乙酸@聚苯胺/多壁碳纳米管纳米复合结构修饰的丝网印刷碳电极（SPCE）作为电化学传感器，采用全印刷技术选择性检测铜，铅和汞离子。改进的电极大大简化了工艺并提高了实用性。方波伏安法用于检测铜，铅和汞离子的浓度，并对离子的选择性，灵敏度，重现性和稳定性进行了研究。检测结果表明，改进的SPCE电极具有较高的选择性，灵敏度和可重复性。铜离子的检出限为55.4 pM，铅离子的检出限为22 pM，汞离子的检出限为17.8 pM。