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EVALUATION OF POSSIBLE BIASES IN THE U.S. EPA'S METHOD 101A-MERCURY EMISSIONS FROM STATIONARY SOURCES
Citation:
Wilshire, F., J. Knoll, AND T. Ward. EVALUATION OF POSSIBLE BIASES IN THE U.S. EPA'S METHOD 101A-MERCURY EMISSIONS FROM STATIONARY SOURCES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-95/258, 1993.
Description:
The U.S. Environmental Protection Agency (EPA), Research Triangle Park, North Carolina, has a program to evaluate and standardize source testing methods for hazardous pollutants in support of current and future air quality regulations. ccasionally, questions arise concerning an established method, requiring additional studies. uch is the case with EPA's Method 101A procedure for the collection and analysis of mercury emissions from stationary sources. PA Method 101A is used for the determination of particulate and gaseous mercury emissions from sewage sludge incinerators and other specified sources. n this method, emissions are withdrawn isokinetically from the source and collected in acidic potassium permanganate solution. he mercury (Hg) collected in the mercuric form is reduced to elemental mercury and aerated from the solution into an optical cell and measured by cold vapor atomic absorption spectrophotometry (CVAAS). unicipal waste incinerators often employ the well-known Thermal Denox method of ammonia injection to reduce nitrogen dioxide emissions in stack effluents. urther, waste incinerators generate HCl during the combustion of plastics and other waste products. ecause of the presence of these substances in emissions, concerns have been raised about their influence upon EPA's Method 101A (M101A) analytical procedure.