Differential Optical Absorption Spectrometry (DOAS) is a UV/VIS optical measurement technique based on Beer-Lambert’s Law. Since absorption coefficients in the UV are generally orders of magnitude higher than in the IR region, sensitivity is usually enhanced, which makes DOAS a method for measuring relatively low concentrations.
|Nitric Oxide (NO)||Benzene (C6H6)||Ozone (O3)|
|Nitrogen Dioxide (NO2)||Toluene (C7H8)||Napthalene (C10H8)|
|Sulfur Dioxide (SO2)||Xylene (C8H10)||Carbon Disulfide (CS2)|
|Ammonia (NH3)||Styrene (C8H8)||Chlorine (Cl2)|
DOAS Uses broadband UV light source instead of a laser light source so Multiple gases can be measured with a single analyzer!
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