from The Century Dictionary.
- noun A salt of hypobromous acid.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry any
saltor esterof hypobromous acid
from Wiktionary, Creative Commons Attribution/Share-Alike License
In a strongly alkaline solution urea is broken up by sodic hypobromite, its nitrogen being evolved in the gaseous state, and its carbon and hydrogen oxidized to carbonic anhydride and water respectively.
Allow to stand in the solution of sodic hypobromite thus prepared a test tube containing exactly 5 c.c. of the urine under examination.
Should the urine contain albumen, it is advisable to remove it by boiling and filtering, as, although only slowly decomposed by the hypobromite solution, it communicates to the liquid such a tendency to froth that the disengagement of the nitrogen is seriously impeded.
The principle of the hypobromite process is simple.
For its determination Knop's sodic hypobromite method, on account of its convenience, is now generally preferred.
_Azo-benzene_, C_6H_5N: NC_6H_5, discovered by E. Mitscherlich in 1834, may be prepared by reducing nitrobenzene in alcoholic solution with zinc dust and caustic soda; by the condensation of nitrosobenzene with aniline in hot glacial acetic acid solution; or by the oxidation of aniline with sodium hypobromite.
The apparatus is used as follows: Remove the cork and pour in mercury until it stands at _e_ and _g_, then fill up to the mark, _f_, with sodium or potassium hypobromite (made by shaking up bromine with a strong solution of sodium or potassium hydroxide).
Now, incline the apparatus till the surface of the hypobromite touches the urine in the longer part of the urine tube, and then bring it upright again.
The urine will thus be discharged into the hypobromite, which will of course decompose the urea, liberating nitrogen, which will cause the mercury to rise in B.
Cork the bottle as shown in the illustration, see that the water is at zero, and that the liquid in the reservoir is at the same level, and then allow the urine to gradually mix with the hypobromite solution.