Excerpt from The Chemical News and Journal of Physical Science, 1900, Vol. 81: With Which Is Incorporated the "Chemical Gazette"; A Journal of Practical Chemistry in All Its Applications to Pharmacy, Arts, and Manufactures
The solution made strongly acid with nitric acid is c... ontained in a previously weighed platinum dish, and a spiral of platinum wire is brought into contact with the surface of the liquid. The dish and spiral are connected to a Bunsen cell, the dish to the positive pole and the Spiral to the negative pole.
The dish is placed on a water-bath, and as soon as the current is started heat is applied to the water-bath and the temperature kept as near 60° C. As possible. It is necessary to have the solution very acid to start with, and as during the operation it is turned into ammonia, a few drops of acid must occasionally be added to it. Great care is necessary to watch that the solution is always acid.
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