EPA Method 6A

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EPA Method 6A:
DETERMINATION OF SULFUR DIOXIDE, MOISTURE, AND CARBON DIOXIDE FROM FOSSIL FUEL COMBUSTION SOURCES

Summary:
A gas sample is extracted from a sampling point in the stack. The SO2 and the sulfur trioxide, including those fractions in any sulfur acid mist, are separated. The SO2 fraction is measured by the barium-thorin titration method. Moisture and CO2 fractions are collected in the same sampling train, and are determined gravimetrically.

Scope:
This method is applicable for the determination of sulfur dioxide (SO2) emissions from fossil fuel combustion sources in terms of concentration (mg/dscm or lb/dscf) and in terms of emission rate (ng/J or lb/106 Btu) and for the determination of carbon dioxide (CO2) concentration (percent). Moisture content (percent), if desired, may also be determined by this method.

Date Issued:
9/25/1997