Abstract
Summary A colorimetric method is described for the determination of ammonia in fluid milk and in dry products of milk based upon the reaction of ammonia with alkaline phenol and sodium hypochlorite. A statistical analysis of data for one sample of fluid milk shows an average deviation from the mean of 0.016mg./l00ml. and a standard deviation of 0.026mg./l00ml., indicating satisfactory reproducibility. The ammonia content of some dry milk products and fluid milk varies considerably with dry whey solids having the highest ammonia content.
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