Controlled Condensate is an alternative to EPA Method 8 for determining sulfuric acid emissions. Sulfuric acid vapor or mist and the sulfur dioxide are separated by controlling the condensation based on difference in dew points, and both fractions are measured separately by the barium-thorin titration method. Controlled condensation method is the primary sampling and analytical tool for quantifying sulfuric acid emissions from stationary sources. The method is based upon the selective condensation of sulfuric acid from a gas stream by means of a water cooled condenser. The major advantage of the condensation method is that it provides reliable reproducible SO3 and SO2 values with minimal interference from high SO2 concentrations.