Cupric amalgamation

The potentiometric micro detection of all aminophenol isomers can be done by titration in two-phase chloroform-water medium (100), or by reaction with iodates or periodates, and the back-titration of excess unreacted compound using a silver amalgam and SCE electrode combination (101). Microamounts of 2-aminophenol can be detected by potentiometric titration with cupric ions using a copper-ion-selective electrode the 3- and... 

It is noteworthy that pure zinc decomposes dilute acids very slowly, but that addition of a few drops of a solution of cupric sulphate or platinum chloride greatly augments the velocity of the reaction. A similar effect is produced by amalgamating the metal. In both instances the acceleration is due to electrolytic action, the copper and platinum being deposited on the zinc (compare method 2, p. 12). 

The pan-amalgamation process has found more favour than the patio process. The ore in the form of fine sludge is stirred in iron pans with a mixture of mercury, common salt, and cupric sulphate. When the action is complete, the excess of mercury is drained off, and the amalgam is allowed to settle, and then decomposed by heat. In the Boss system the process is continuous, a series of pans and settlers being employed. Some silver ores, notably those containing sulphides of arsenic, antimony, copper, iron, and zinc, are roasted with common salt before amalgamation. 

A study involving iron amalgams in acidic and alkaline media indicates a magnetic field effect on the Tafel slope, probably due to a complex interaction of the magnetic field with amalgam formation, diffusion, and hydrogen evolution. Experimental results obtained with cupric sulfate solutions show no magnetic field effect on the transfer coefficient... 

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