Abstract
Abstract Nitrogen in organic compounds, agricultural and animal products is converted into ammonium sulphate by Kjeldahl digestion. The ammonium sulphate is reacted quantitatively with hypobromite produced in situ by the addition of an excess of potassium bromate and bromide. The unutilized potassium bromate is determined iodometrically and the amount of ammonia nitrogen can be calculated from the consumed potassium bromate. Accurate results are also obtained when potassium bromate is replaced with potassium permanganate or dichromate for the determination of ammonia nitrogen in Kjeldahl digests. However, the present method is not applicable to the determination of ammonia nitrogen in undigested sample.
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