The article reports on utilization of double deposition and stripping steps for increasing sensitivity of Cu(II) determination by anodic stripping voltammetry (ASV) at two lead film working electrodes. A significant preconcentration of copper was achieved thanks to utilization of a simple design of four electrodes system that gives possibility to perform one measurement cycle consisting of two deposition and two stripping steps. Due to the fact that deposition step is doubled, the concentration of Pb(II) needed to lead film electrodes formation was significantly reduced as compared to traditional procedures using three electrodes system. The analytical procedure of Cu(II) determination was optimized. The experimental factors: supporting electrolyte's pH and its concentration, lead ions concentration, potential and time of deposition at both working electrodes were studied. The Cu(II) peak current was linearly dependent on its concentration from 5×10⁻¹⁰ to 2×10⁻⁸ mol L⁻¹ (deposition time of 270 and 160 s at the first and the second working electrode, respectively). The obtained detection limit for copper ions determination was 2.1×10⁻¹⁰ mol L⁻¹. The described procedure was validated by analysis of two water certified reference materials. The described procedure was also utilized for real water sample analysis.

中文翻译：

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在双沉积双汽提系统中进行实际水样分析的灵敏阳极溶出伏安铜离子

该文章报道了在两个铅膜工作电极上利用双重沉积和剥离步骤来提高通过阳极溶出伏安法（ASV）测定Cu（II）的灵敏度。由于采用了四电极系统的简单设计，因此实现了显着的铜预富集，该系统可以执行一个由两个沉积和两个汽提步骤组成的测量周期。由于沉积步骤增加了一倍，因此与使用三电极系统的传统工艺相比，引线膜电极形成所需的Pb（II）浓度大大降低。优化了Cu（II）测定的分析程序。实验因素：支持电解质的pH值及其浓度，铅离子浓度，研究了两个工作电极上的电势和沉积时间。Cu（II）峰值电流从5×10开始线性取决于其浓度^-10至2×10 ^-8  mol L ^-1（在第一和第二工作电极上的沉积时间分别为270和160 s）。所获得的用于铜离子测定的检测极限为2.1×10 ^-10  mol L ^-1。通过分析两种经水认证的参考物质，验证了所描述的程序。所描述的程序也用于真实水样分析。