工作场所空气中氨的纳氏试剂分光光度法的原理是空气中氨用大型气泡吸收管采集,在碱性溶液中,氨与纳氏试剂反应生成黄色,于420nm波长下测量吸光度,进行测定。然而,由于该方法中吸收液硫酸的浓度太高,致使加入纳氏试剂后溶液呈酸性,结果不显色。为此,我们通过实验研究,提出了适 Amounts of ammonia in the workplace ammonia reagent spectrophotometry principle is the air of ammonia with a large bubble absorber tube collection, in alkaline solution, ammonia and Nessler reagent yellow, 420nm wavelength absorbance was measured for determination. However, since the concentration of the sulfuric acid in the absorption solution is too high in this method, the solution becomes acidic after adding the Nessler reagent, and as a result, no color is observed. To this end, we through the experimental study, put forward suitable