Selvolini Giulia, Marrazza Giovanna
"Ugo Schiff" Chemistry Department, University of Florence, Via Della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy.
"Ugo Schiff" Chemistry Department, University of Florence, Via Della Lastruccia 3, 50019 Sesto Fiorentino (FI), Italy.
Talanta. 2023 Feb 1;253:123918. doi: 10.1016/j.talanta.2022.123918. Epub 2022 Sep 7.
This work presents the realization and the application of an user-friendly electrochemical platform based on screen-printed electrodes for the simultaneous determination of nickel and cobalt ions in real samples by means of square wave adsorptive stripping voltammetry (SWAdSV). The sensor was realized by electrodepositing in situ a bismuth film onto graphite screen-printed electrodes (GSPEs). The sensor surface was fully characterized by scanning electron microscopy (SEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The experimental conditions for the determination of nickel and cobalt in the form of dimethylglyoximate complexes were studied and optimized. Linear calibration curves for Ni(II) and Co(II), determined individually and together, in the range 10-40 μg/L for nickel and 10-60 μg/L for cobalt, respectively, were obtained. The limits of detection for nickel and cobalt determination were 2.5 μg/L and 2.4 μg/L, respectively. The performance of the sensor in terms of reproducibility and selectivity was also studied. The applicability of the developed platform was assessed by determining nickel and cobalt in samples deriving from an industrial process of recycling exhausted batteries and in soil samples.
本工作介绍了一种基于丝网印刷电极的用户友好型电化学平台的实现及其应用，该平台通过方波吸附溶出伏安法（SWAdSV）同时测定实际样品中的镍离子和钴离子。该传感器是通过在石墨丝网印刷电极（GSPEs）上原位电沉积铋膜实现的。通过扫描电子显微镜（SEM）、循环伏安法（CV）和电化学阻抗谱（EIS）对传感器表面进行了全面表征。研究并优化了以丁二酮肟配合物形式测定镍和钴的实验条件。分别获得了镍和钴单独测定以及一起测定时的线性校准曲线，镍的线性范围为10 - 40μg/L，钴的线性范围为10 - 60μg/L。镍和钴测定的检测限分别为2.5μg/L和2.4μg/L。还研究了传感器在重现性和选择性方面的性能。通过测定来自废旧电池回收工业过程的样品和土壤样品中的镍和钴，评估了所开发平台的适用性。
