An Integrated Manual Impinger Method for The Simultaneous Determination of NOx and SOx in Source Effluents

A manual procedure Is outlined which utilizes an alkaline permanganate sampling train for the simultaneous collection of nitrogen and sulfur oxides from stationary sources. Dependent on anticipated concentrations, samples of up to an hour duration may be taken. Analysis of the collected NO_x and SO_x is straightforward, tailored for needed accuracy and minimum employment time. For oxides of nitrogen, the formed nitrites of collection are converted to nitrates. The total nitrate is then reduced to nitrite, diazotized and coupled to form a red dye. This is all accomplished with a commercially available "ready-made" reagent. The oxides of sulfur are determined by the turbidimetric barium sulfate procedure. Data are shown comparing the proposed method from numerous types of emission sources, both with accepted methods and newer instrumental techniques. The ability to sample simultaneously for NO_x and SO_x has many advantages, i.e., power plants, boilers, and other sources where both gases are of interest for compliance and/or source Inventory purposes.