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GUIDELINES FOR MERCURY MEASUREMENTS FROM STATIONARY SOURCES: QUALITY ASSURANCE HANDBOOK, SECTION 3.19
Citation:
Wilshire, F., P. Grohse, AND B. DeWees. GUIDELINES FOR MERCURY MEASUREMENTS FROM STATIONARY SOURCES: QUALITY ASSURANCE HANDBOOK, SECTION 3.19. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/R-92/234.
Description:
Method 101A (M101A) is similar to Method 101 for the determination of mercury (Hg) from stationary sources. n M101A, however, acidic potassium permanganate solution is used for sample collection instead of acidic iodine monochloride solution. his method applies to the determination of particulate and gaseous mercury emissions from sewage sludge incinerators and other sources (as specified in the regulations). articulate and gaseous Hg emissions are withdrawn isokinetically from the source and collected in acidic potassium permanganate solution. he collected Hg (in mercuric form) is reduced to elemental Hg, which is then aerated from the solution into an optical cell and measured by atomic absorption spectrophotometry. fter initial dilution, the range of this method is 20 to 800 ng Hg/mL. he upper limit can be extended by further dilution of the sample. he sensitivity of the method depends on the recorder/spectrophotometer combination selected. he collection efficiency of the sampling method can be affected by excessive oxidizable matter in the stack gas that prematurely depletes the potassium permanganate solution. he method descriptions given are based upon the method promulgated October 15, 1980, and on corrections and additions published in the Federal Register on September 12, 1984, and September 23, 1988. lso, current updates in M101A analytical procedures are included in Section 3.19.10, for the recovery of Hg from the filter catch in the analytical step 7.3.2 of the method/