Method for determining ammonia nitrogen content of air by Nessler reagent spectrophotometry

The invention discloses a method for determining ammonia nitrogen content of air by Nessler reagent spectrophotometry, and relates to the field of air detection. According to the technical scheme, themethod is characterized by comprising the following steps: I, sample collection; II, control test; III, sample treatment; IV, drawing of a standard curve; and V, sample determination and calculation.A test tube with lead acetate cotton is connected in series before sampling, so that the influences of formaldehyde and hydrogen sulfide on ammonia detection are eliminated effectively, thereby effectively improving the accuracy of ammonia detection. 本发明公开了一种纳氏试剂分光光度法测定空气中氨氮含量的方法，涉及空气检测领域，其技术方案要点是步骤一、样品采集；步骤二、对照试验；步骤三、样品处理；步骤四、标准曲线的绘制；步骤五、样品测定及计算。本申请通过在取样前串联一个带醋酸铅棉花的试管，有效地除去甲醛和硫化氢对氨检测的影响，从而有效地提高了氨检测的准确性。