The present work describes the electrochemical detection of Cd²⁺ using reduced graphene oxide (rGO), carboxymethyl cellulose (CMC) and glutathione (GSH) modified glassy carbon electrode (GCE) by Square Wave Anodic Stripping Voltammetry (SWASV). The prepared nanocomposite was characterized by X-ray diffraction (XRD), RAMAN, Scanning Electron Microscopy (SEM), Fourier Transform Infrared (FTIR) and X-ray photoelectron spectroscopy (XPS), Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The influence of experimental parameters such as effect of pH, choice of supporting electrolyte, deposition time and deposition potential, were optimized. Under the optimized conditions, the linear relationship between the current intensity and Cd²⁺ concentration (2 to 20 nM) was I (μA) = -6.78 (c/nM) + 4.547 (R² = 0.996). The detection limit and sensitivity achieved for the modified electrode were 0.05 nM and 4.5 μA/nM respectively. Finally, rGO/CMC/GSH/GCE was successfully demonstrated for the detection of Cd²⁺ in real samples, and the results were compared with AAS analysis.

本工作描述了通过方波阳极溶出伏安法（SWASV）使用还原的氧化石墨烯（rGO），羧甲基纤维素（CMC）和谷胱甘肽（GSH）修饰的玻碳电极（GCE）电化学检测Cd ^2+的方法。通过X射线衍射（XRD），拉曼（Raman），扫描电子显微镜（SEM），傅立叶变换红外（FTIR）和X射线光电子能谱（XPS），循环伏安法（CV）和电化学阻抗谱（EIS）对制备的纳米复合材料进行了表征。 ）。优化了诸如pH值的影响，支持电解质的选择，沉积时间和沉积电位等实验参数的影响。在优化条件下，电流强度与Cd ²⁺之间的线性关系浓度（2至20 nM）为I（μA）= -6.78（c / nM）+ 4.547（R ² = 0.996）。修饰电极的检测限和灵敏度分别为0.05 nM和4.5μA/ nM。最后，成功地证明了rGO / CMC / GSH / GCE可用于实际样品中Cd ²⁺的检测，并将结果与​​AAS分析进行了比较。