Sulfur Trioxide, Oxygen, Platinum Electrode in a Fused Sulfate

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Abstract
The behavior of the electrode was studied at concentrations in the parts per million range. The cell studied consists of two similar electrodes isolated from each other by a solid cation permeable membrane. One electrode is a reference electrode through which passes an air or oxygen stream containing a fixed and known concentration of . Through the other electrode is passed a similar gas stream containing a variable concentration of . The passes into each electrode through a platinum inlet tube which converts a fraction of the in the gas stream to . The emf vs. concentration behavior of this cell was studied and shown to exhibit Mernstian behavior. This work shows that the cell has possible applications in continuous monitoring of ambient air for both and , i.e., sulfuric acid aerosols.

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