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Abstract
A manual integrated method is described which utilizes an alkaline permanganate sampling train for the collection of nitrogen oxides from stationary sources. The total nitrates collected are determined by colorimetric procedure with 2,6-xylenol. Sample flow rate for maximum collection efficiency is 0.3 1/min or lower. Sampling time depends on the NOx concentration expected and the variation of process conditions. Data is shown comparing the proposed method with the accepted one from several types of emission sources.