Bredig's arc method
From Infogalactic: the planetary knowledge core
Lua error in package.lua at line 80: module 'strict' not found. Bredig's arc method is a method of preparation of colloidal solution, of metals such as gold, silver or platinum.
This method consists of both dispersion and condensation. An arc is struck between electrodes, under the surface of water containing some stabilizing agent such as traces of KOH (potassium hydroxide).The intense heat of the arc vaporizes some of the metal which then condenses under cold water. The water is kept cold as an ice bath.
This method is not suitable when the dispersion medium is an organic liquid as considerable charring occurs.
References
- Wiki Chemistry As of May 14, 2016 link was dead and site for sale.
