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Explain in detail anodic stripping voltammetry.(short details)
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Anodic stripping voltammetry (ASV) is an electroanalytical technique used to determine the concentration of trace metals in a sample. It involves three main steps:
1. Preconcentration: The analyte metal ions are deposited onto a working electrode (usually a mercury electrode) by applying a negative potential. This step effectively concentrates the metal ions on the electrode surface.
2. Stripping: After the preconcentration step, the potential is scanned in the positive direction. This causes the deposited metal to oxidize and dissolve back into the solution, producing a current peak. The peak height is directly proportional to the concentration of the metal in the sample.
3. Analysis: The peak height is measured and used to determine the concentration of the metal. The technique is very sensitive, allowing for the detection of metal concentrations in the parts-per-billion (ppb) range.
ASV is widely used in environmental monitoring, food safety, and clinical chemistry.
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