Development of long-term sulfur dioxide monitor using permeation sampling
A method of monitoring sulfur dioxide for weeks or po concentrations can be directly correlated to federal regulations. The method involves collecting SO2 by permeation of the gas through a membrane into a catalytic oxidizing solution that stabilizes the SO2 as sulfate. The sulfate is analyzed turbidimetrically by precipitation as 2-perimidinylammonium sulfate. (1 diagram, 2 graphs, 2 tables)