مشخصات پژوهش

Heavy metals, specifically lead and cadmium ions, are widely recognized as extremely toxic elements [1]. Considering the importance of measuring these heavy metals in the environment, it is very important to provide a suitable solution for measuring these metals in trace amounts [2]. In this study, metal oxide-conductive polymer was electrodeposited on a graphenized pencil electrode. This innovative approach was employed to enable the concurrent determination of Cd(II) and Pb(II) within water samples. Also the fabricated electrode was characterized by FESEM and cyclic voltammetry were conducted to investigate the successful formation of metal oxide-conductive polymer. As well as, the effecting important parameters such as accumulation potential and accumulation time were optimized. Under the optimized conditions (200 s time, -1.0 V accumulation voltage, pH 6), the prepared metal oxide-conductive polymer was utilized for Cd(II) and Pb(II) ions by differential pulse anodic stripping voltammetry (DPASV). Accordingly good linearity with the concentration range of 33.2-332 nM and 66.4-664 nM, detection limit of 1.7nM and 7.7 nM and sensitivity of 11.34 μA μM-1 and 25.38 μA μM-1 were obtained with Cd(II) and Pb(II) respectively. As a result, it used this analysis to measure the real sample due to the ease of obtaining suitable results