Effect of High Concentration of Ammonia on Color Development by Indigophenol Blue Spectrophotometry
In this paper,indophenol blue spectrophotometry was used to test different concentrations of ammonia solution,and the reason of low data often appeared in the practical application of indoor ammonia detection in civil building engineering was discussed.The results show that the color reaction is obviously affected by the concentration of ammonia.When the concentration of ammonia exceeds 7.6 μg/mL,the ab-sorbance of the solution decreases rapidly.When the concentration of ammonia solution exceeds 120.0 μg/mL,the absorbance value is lower than 0.030,and the color of the solution is close to light yellow,without color.When using indophenol blue spectrophotometry to measure am-monia,the ammonia concentration should not exceed 15 μg/mL,and the dilution should not exceed 2.5 times.
indophenol blue spectrophotometryAmmoniaconcentrationcolor reaction
万方数据
维普
