APT废水中氨氮的测定

APT废水中氨氮主要以铵盐的形式存在,采用蒸馏滴定法测定其氨氮的总量,方法以20 g/L硼酸溶液为吸收液,吸收蒸馏出的NH3,用甲基红--亚甲基蓝为指示剂,硫酸标准溶液滴定.方法的标准平均偏差为1.9%,回收率为99%～105%.

Determination of Ammonia-nitrogen in APT Wasting Water

In APT wasting water,tile ammonia-nitrogen exists usually as aminium salt. The total ammonia-nitrogen in APT wasting water was determined by the distillation-titration method in this paper. The results show that the method is effective and evident. Additionally, the results of the study provide a detailed characterization of the types and concentration of reagent in determination of ammonia-nitrogen. The absorbent that absorbs the ammonia is the solution of 20 g/L boric acid ; the indicator is Methyl red and Methylene blue ; the titration solution is the standard solution of vitriol. It indicates that the standard average deviation is 1.9% , and the ratio of recycle is 99% - 105%.