constant-potential electrogravimetry
chemistry
Quick Summary
Constant-potential electrogravimetry is an instrumental method of chemical analysis used for quantitative analysis. It is a gravimetric technique where a solid product of an analyte's electrochemical reaction is deposited onto a preweighed electrode.1
How it Works:
- A constant electrical potential is applied to a working electrode.
- This potential is controlled so that only a specific electrochemical reaction occurs, causing the analyte to deposit as a solid on the electrode.1
- After the reaction is complete, the electrode is removed, cleaned, dried, and weighed.
- The increase in the electrode's mass directly corresponds to the amount of analyte present in the solution.1
This method is preferred when precise control is needed to ensure only one component reacts, minimizing interferences. Assays typically take about an hour.1
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