Nessler Method Research Articles

Determination of Ammonia in Condensed Steam

Abstract Of the impurities which may affect the electrolytic conductivity and pH of water, the gases carbon dioxide and ammonia are most resistant to removal. Carbon dioxide has previously been given consideration almost to the exclusion of the ammonia-removal problem. This second paper in a series of three on the subject of purity of steam by the authors deals with the preparation of ammonia-free water by various methods, of which phosphorus-pentoxide batch distillation apparently gives the most satisfactory results. The Nessler method of ammonia determination is also thoroughly discussed, as well as the volumetric determination of ammonia with sodium hypobromite and naphthyl red. The authors have used such determinations of ammonia in condensed steam to assist in evaluating a suitable correction factor to compensate for its presence.