1. Introduction to Ozone Instrumentation and Analysis
Nate Herbst,
Southern Ute Indian Tribe
Joe Hameed, ITEP/TAMS

2. Intro to Instruments and Analysis
What type of instrumentation is used?
What type of analysis is employed?
How is the analysis performed?
How does the analyzer work?

3. Ozone Analyzer Basics Design based on U.V absorption
U.V photometry  [O3]
Some pictures of the Thermo 49C

4. Theory of Analysis Ozone absorbs 240nm U.V radiation
Dual cell technique  ambient and zero absorptions
Zero and ambient absorptions compared
Ozone concentration = ambient absorption – zero absorption

5. U. V. Photometric Absorption
Remember: ozone absorbs U.V.
Photo courtesy of University of Wisconsin General Chemistry Class.
Ozone absorbing U.V radiation.
Animation by NASA.
Amount of U.V light leaving cell #1 corresponds to [O3]
Amount of U.V light leaving cell #2 provides your blank
U.V. Lamp
Zero air
Ambient air
Detector

6. Ozone Analyzer Optical System (Thermo Env. 49C)