Collaborative Study of Method for the Determination of Sulfur Dioxide Emissions from Stationary Sources (Fossil-Fuel Fired Steam Generators).

摘要

A collaborative study has been performed on Method 6promulgated by EPA for determining the concentration of sulfur dioxide emissions from stationary sources. Method 6specified the extraction of a gas sample from the stack,the separation of the sulfur dioxide from the acid mist including sulfurtrioxide,and the measurement of the sulfur dioxide fraction as sulfate by the barium-thorin titration method. Collaborative tests were conducted at both a coal-fired steam generating power plant and an oil-fired pilot plant by the same four collaborative teams. Most (75%) of the reproducibility variation in a test result resides in the field sampling phase of Method 6,with 25% occurring in the analytical phase. Only 13% reproducibility variance is caused by repeatability sources,while 87% results from lab bias sources.