CALCULATIONS:
11. Determine the mass, μg, of sulfate equivalent found on the front (W f) and back (W b) filters and in the
corresponding average media blanks (B f and Bb).
NOTE: The sulfate equivalent is the sum of the sulfate peak, μg, and 1.200 times the sulfite peak,
μg, on the chromatogram (1.200 = MW SO 4
2/
MW SO3
2):
μgsulfate equivalent = μgsulfate +
1.200 μgsulfite.
12. Calculate the concentration, C SO2, of sulfur dioxide, applying the factor 0.667 (MW SO 2/MW SO4
2):