Nessler's Reagent Spectrophotometry For Determination Of Ammonia Nitrogen Countermeasure Research Problems

Ammonia nitrogen widely existing rivers, lakes, seas and surface and groundwater quality evaluation, aquaticfor one of important indexes. The water of ammonia nitrogen, refers to the free ammonia (or weigh nonionic ammonia, NH3) and ion ammonia (NH4+) exists in the form of nitrogen. Water nitrogen different geometrical shape its content level, and can be effectively prediction and reflect the water pollution condition.In environment water in testing, the determination of ammonia nitrogen multi-purpose na's reagent method, na's reagent colorimetric method has simple operation, sensitive to wait for a characteristic, but calcium, magnesium, iron and other metal ions, sulfide, aldehydes, ketone, and water chrominance and cloudy etc, need corresponding determination interference pretreatment. The method by na's generation going into the bottom of the reagent blank value higher and higher, affect curve linear, Reagents interference, influenced by measure part of suction light value.But na's reagent determination of ammonia nitrogen, influence factors are very much, from the perspective of the whole process, reagent purity, laboratory environment, without ammonia colour-display reagent preparation, the configuration and preservation, sample pretreatment, water sample pH value, colour-display reagent and the dosage, masking agent colour-display time length etc, will affect the accuracy of determination results.Therefore this paper's reagent colorimeter.as is najaf on determination of ammonia nitrogen various influential factors were studied.This paper put forward the innovation point is:high salt in wastewater pretreatment the difficult problem.