| What is stripping voltammetry? Taking a suitable example discuss the anodic stripping voltammetry. |
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Stripping voltammetry is an electroanalytical technique used to determine the concentration of specific chemical substances, particularly metal ions, in a solution. It involves three main steps: deposition, stripping, and measurement. Anodic stripping voltammetry (ASV) is a subtype of stripping voltammetry that focuses on the oxidation (anodic) step. ASV is widely applied in environmental, analytical, and industrial chemistry to detect trace levels of heavy metal ions, like lead, cadmium, and mercury, due to its high sensitivity and selectivity.
Here's how anodic stripping voltammetry works with a suitable example using the detection of lead ions (Pb²⁺) as a case study:
1. Deposition: In the first step, a working electrode (commonly a mercury drop electrode) is immersed in the sample solution containing the analyte of interest (in this case, Pb²⁺ ions). A potential is applied to the working electrode, and as a result, Pb²⁺ ions
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