A novel electrochemical sensor based on glassy carbon electrode (GCE) modified by poly (1,2-diaminoanthraquinone) (P1,2-DAAQ) has been developed for individual and simultaneous determination of Cd2+, Pb2+, Cu2+ and Hg2+ using square wave anodic stripping voltammetry (SWASV). P1,2-DAAQ was characterized by cyclic voltammetry (CV) and scan electron microscope (SEM). Several analytical parameters such as the type of electrolyte solution, polymer film thickness, metal deposition time and deposition potential were investigated and optimized. Optimal conditions were obtained by using five scan cycles for polymer synthesis and 120 seconds at −1.6 V for metal electrodeposition in acetate buffer solution. Good linear responses to Cd2+, Pb2+, Cu2+ and Hg2+ in the concentration range from 0 to 120 μg/L were obtained. The limit of detections (LOD) for simultaneous determination of Cd2+, Pb2+, Cu2+ and Hg2+ were 0.3 μg/L, 0.58 μg/L, 1.94 μg/L and 0.26 μg/L, respectively. The developed method was also applied for their detection in real water samples for which favorable results obtained compared with those obtained using inductively coupled plasma – optical emission spectroscopy (ICP-OES).

中文翻译：

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基于聚（1,2-二氨基蒽醌）的新型传感器，用于 Cd2+、Pb2+、Cu2+ 和 Hg2+ 的单独和同时阳极溶出伏安法

基于由聚（1,2-二氨基蒽醌）（P1,2-DAAQ）改性的玻碳电极（GCE）开发的新型电化学传感器已开发用于使用方波阳极剥离单独和同时测定 Cd2+、Pb2+、Cu2+ 和 Hg2+伏安法 (SWASV)。P1,2-DAAQ 通过循环伏安法 (CV) 和扫描电子显微镜 (SEM) 进行表征。研究和优化了几个分析参数，例如电解质溶液的类型、聚合物膜厚度、金属沉积时间和沉积电位。通过使用五个扫描周期进行聚合物合成和 120 秒在 -1.6 V 下在醋酸盐缓冲溶液中进行金属电沉积，获得了最佳条件。在 0 至 120 μg/L 的浓度范围内，获得了对 Cd2+、Pb2+、Cu2+ 和 Hg2+ 的良好线性响应。同时测定 Cd2+、Pb2+、Cu2+ 和 Hg2+ 的检出限 (LOD) 分别为 0.3 μg/L、0.58 μg/L、1.94 μg/L 和 0.26 μg/L。所开发的方法也应用于实际水样中的检测，与使用电感耦合等离子体 - 光发射光谱 (ICP-OES) 获得的结果相比，获得了更好的结果。