Untitled Document Determination of Halogen Species in Combustion System Flue Gas Methods were investigated for sampling and analyzing for halogen species in coal-fired combustion flue gas, which are important to mercury speciation. An evaluation of EPA Method 26A revealed inaccurate speciation of Cl 2 in a simulated flue gas matrix. It was concluded that the concentrations of sulfur dioxide typically present in utility flue gases interfere with the method's ability to properly speciate Cl 2 . Alternate methods of fluorine collection, including colormetric systems and using ion-selective electrodes, were also tested.
Results indicate the possible development of a continuous emission monitor for fluorine analysis.