Study on determination method of soil ammonium nitrogen
LI Jun-jie;CHEN Xiao-di;Yanjiao Central Laboratory of North China Nonferrous Geological Prospecting Bureau;
Ammonium nitrogen was distilled from hydrochloric acid by weakly alkaline distillation of magnesium oxide, and yellow complex was formed by complexation with Nessler's reagent under basic conditions. The colorimetric assay was carried out. Compared with the traditional method, this method is more efficient and accurate and reliable. It provides an accurate and rapid method for the determination of ammonia nitrogen.