Britannica
Sources used in this answer
How does electrodeposition help measure copper in an alloy?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
chemical analysis
Strip of pH paper resting on specimen, with a comparison chart.
In the context of chemical analysis, electrodeposition is a gravimetric analysis technique used to determine the amount of copper in an alloy by isolating it through electrolysis.1
The process functions as follows:
- Preparation: The alloy sample is dissolved into a solution containing its metallic ions.12
- Deposition: An electric current is passed through the solution, causing the copper to plate out onto a preweighed cathode.134
- Measurement: Once the copper has been completely removed from the solution, the electrode is removed, rinsed, dried, and weighed. The increase in the electrode's mass represents the amount of copper originally present in the alloy.4
This method is effective provided the sample is free from other metals that would plate out under the same conditions. When used specifically for quantitative analysis in this manner, the technique is referred to as electrogravimetry.142