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17 videosLast updated on Sep 5, 2023. Play all · Shuffle · 5:14. Login Assistance. Georgia Department of Administrative Services (DOAS).
YouTube-Georgia Department of Administrative Services (DOAS)
2023/09/05Hello everybody, in this video I'm going to show you how to use Differential Optical Absorption Spectroscopy
DOAS is a technique that is used to monitor pollutants in the atmospheric air.
This form of spectroscopy is often used in Continuous Emission Monitoring Systems or CEMS.
In this first example we show you how to measure car emissions.
To measure DOAS it is required to measure small particles
The halogen light source is used with a collimating lens to create a parallel light beam.
The data from the spectrometer will be analyzed using software.
The next example focuses on industrial emissions.
To monitor CEMS, or continuous emission monitoring systems, we use DOAS technique.
In the next example I'll explain how DOAS technique is also used to detect gas leaks.