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A manual 24-h Integrated method for determining S02, NOx, and C02 In emissions from electric utility plants was developed and field tested downstream from an S02 control system. Samples were collected In alkaline potassium permanganate solution contained In restricted-orifice Implngers. S02 Is oxidized to S042" and S2Oe2", and NOx (NO + N02) Is oxidized to N03"; C02 Is converted to C032". Samples were analyzed by Ion chromatography. The method showed 100% collection efficiency for all three pollutants at a sample flow rate of 35 cm3/min and was found to be unbiased relative to Independent monitoring systems. At a flow rate of 75 cm3/ min, the collection efficiency was still 100% for S02 and NOx, but dropped to 80 % for C02. The relative standard deviation for the three determinations was as follows: S02, 0.2-8%; NOx, 3-6%; and C02, 2-8%. Further work Is needed to determine the error In the S02 determination caused by H2S04 absorption.

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