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Conductivity cell apparatus for continuous measurement of sulfur dioxide concentrations between 40 ppm and 1 per cent.
Anal Chem 1972 May; 44(6):1104
Sulfur dioxide, at concentrations of 40 ppm to 1 percent in the off gas of an so2 removal system, must be monitored continuously in the presence of normal atmospheric gases and combustion products. An inexpensive and reliable conductivity cell using h2o2 as the absorbing reagent is used to measure so2 concentrations at less cost to the user than commercial instruments currently available. The instrument and systems for controlling the liquid and gas flows to obtain reproducible and reliable measurements of so2 concentrations are described.
H. Richard Beard, Salt Lake City Metallurgy Research Center, Bureau of Mines, U.S. Department of the Interior, Salt Lake City, Utah
OP; Journal Article
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Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division