ANALYSIS OF AMMONIUM ION IN WET DEPOSITION DURING COLD AND WARM SEASONS USING A MODIFIED NESSLER METHOD

Studies on the Nessler's reagent method were performed considering the spectrum of the complex formed of ammonium with the Nessler's reagent, the stability over the time of the absorbance of complex. The method was validated statistically and by recovery studies for linearity, precision, repeatability, and reproducibility. The obtained results proved that the method can be employed for the routine analysis of ammonium in diluted solution as the wet deposition samples. Analysis of wet depositions was performed on samples of precipitation collected from urban and rural.