Natural and anthropogenic sources have been reported but few measurements of deposition losses have been made. There are currently 30 laboratories participating throughout the world. The Measurements, Technology, and Standards group is one of the four major SOS scientific groups. The experiment employed a well-defined series of reference standards and potential interferences added to a zero air matrix in a glass manifold. Accurate measurements of formaldehyde are needed in order to both constrain and validate tropospheric photochemical models.
Data processing is in progress.
The study included comparisons of standards and ambient air samples.