A chemical-film system for the detection and measure¬ment of atmospheric ozone has been shown to be feasible. This system is based on the oxidizing power of ozone to produce ions in an otherwise essentially nonconducting system. The conductivity is then a measure of the oxidation reaction and hence the ozone concentration-under suitable experimental conditions. Another system based on the –change in potential of a suitable redox electrode has been shown to respond to ozone. The sensitivity and time response characteristics of both these systems still require additional development work before an ozone-sensitive film can be incorporated into a complete instrument.
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