Concept: Differential Optical Absorption Spectroscopy (DOAS) in the measurementmethod vocabulary

Concept URI	http://dd.eionet.europa.eu/vocabulary/aq/measurementmethod/DOAS
Preferred label	Differential Optical Absorption Spectroscopy (DOAS)
Definition	In atmospheric chemistry, differential optical absorption spectroscopy (DOAS) is used to measure concentrations of trace gases. When combined with basic optical spectrometers such as prisms or diffraction gratings and automated, ground-based observation platforms, what we have is a cheap and powerful means for the measurement of such trace gas species as ozone and nitrogen dioxide.
Notation	DOAS
Status	Valid
Status Modified	2013-03-22
Accepted Date	2013-03-22
Not Accepted Date
Scope note	Measurement of SO2, NO2