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Open AccessArticle

Coupling of Anodic Stripping Voltammetry with Sampled-Current Voltammetry on an Electrode Array: Application to Lead Detection

Univ Rennes, CNRS, ISCR-UMR 6226, F-35000 Rennes, France
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Author to whom correspondence should be addressed.
Sensors 2020, 20(5), 1327; https://doi.org/10.3390/s20051327
Received: 24 January 2020 / Revised: 24 February 2020 / Accepted: 27 February 2020 / Published: 29 February 2020
(This article belongs to the Special Issue Sensors for Environmental and Life Science Applications)
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−1, similar to those obtained with linear sweep anodic stripping voltammetry. View Full-Text
Keywords: electrochemical sensor; electrode array; sampled-current voltammetry; lead; anodic stripping voltammetry electrochemical sensor; electrode array; sampled-current voltammetry; lead; anodic stripping voltammetry
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MDPI and ACS Style

Mazerie, I.; Geneste, F. Coupling of Anodic Stripping Voltammetry with Sampled-Current Voltammetry on an Electrode Array: Application to Lead Detection. Sensors 2020, 20, 1327.

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