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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Coupling of Anodic Stripping Voltammetry with Sampled-Current Voltammetry on an Electrode Array: Application to Lead Detection
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Coupling of Anodic Stripping Voltammetry with Sampled-Current Voltammetry on an Electrode Array: Application to Lead Detection

机译：电极阵列上阳极溶出伏安法与采样电流伏安法的耦合：在铅检测中的应用

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Electrochemical detection systems are very promising for pollution monitoring owing to their easy miniaturization and low cost. For this purpose, we have recently developed a new concept of device based on Electrodes Array for Sampled-Current Voltammetry (EASCV), which is compatible with miniaturization and portability. In this work, to improve the sensitivity of the analytical method, we added a preconcentration step before EASCV analysis, combining sampled-current voltammetry with anodic stripping voltammetry. Lead was chosen as analyte for this probe of concept owing to its high toxicity. The conditions for electrodeposition of lead on gold were optimized by means of under potential deposition. Current intensities 300 times higher than with linear sweep anodic stripping voltammetry were obtained, showing the interest in the method. The value of the sampling time directly affected the sensitivity of the sensor given by the slope of the linear calibration curve. The sensor exhibited a limit of detection of 1.16 mg L , similar to those obtained with linear sweep anodic stripping voltammetry.
机译：电化学检测系统由于易于小型化和低成本而在污染监测方面非常有前途。为此，我们最近开发了一种基于采样电流伏安电极阵列（EASCV）的设备新概念，该设备可实现小型化和便携性。在这项工作中，为提高分析方法的灵敏度，我们在EASCV分析之前增加了预浓缩步骤，将采样电流伏安法与阳极溶出伏安法相结合。由于其高毒性，铅被选作该概念探针的分析物。通过电势沉积优化了在金上电沉积铅的条件。获得的电流强度比线性扫描阳极溶出伏安法高300倍，显示出对该方法的兴趣。采样时间的值直接影响由线性校准曲线的斜率给出的传感器的灵敏度。该传感器的检出限为1.16 mg L，与通过线性扫描阳极溶出伏安法获得的检出限相似。

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