Monitoring Ozone In Ambient Air

This presentation explains the UV absorption method used for monitoring ozone in the ambient air. Ozone is continuously measured by ultraviolet absorption photometry. In the ultraviolet analyzer, a mercury vapor lamp is used to produce ultraviolet radiation at 254 nm which is absorbed by the ozone in the air sample. The ozone signal is determined by the difference between ambient air containing ozone and ambient air with the ozone removed or scrubbed.

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