Study on Determination of Ammonia Nitrogen in Medical Wastewater by Nessler's Reagent Spectrophotometry
In this experiment,three points in the morning,noon and afternoon were selected to sample the medical effluent water samples of the affiliated hospital,and the ammonia nitrogen was measured.The STD values were 0.006,0.015,0.012,and the RSD values were 0.008,0.019,0.016,which were statistically significant,and the experimental results were basically in line with the ammonia nitrogen emission standard in Discharge standard of water pollutants for medical organization(GB 18466-2005).Comparing the measurement results of the three time periods,it was found that the mass concentration of ammonia nitrogen in the medical effluent in the morning was slightly lower,and the mass concentrations of ammonia nitrogen in the medical effluent at noon and afternoon were approximately the same.This was because the mass concentration of ammonia nitrogen in the medical outlet of the hospital was dynamic,which was affected by the temperature.The local disease control center needs to regularly sample sewage from medical institutions every week to test whether the discharge of ammonia nitrogen meet the standard,so as to prevent secondary pollution to the living environment of residents.
Medical effluentDetermination of ammonia nitrogenNessler's reagent methodStandard curve
万方数据
维普
