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. Author manuscript; available in PMC: 2016 Jan 20.
Published in final edited form as: Atmos Environ (1994). 2015 Dec;122:250–258. doi: 10.1016/j.atmosenv.2015.09.061

Fig. 4.

Fig. 4

Relationship between DMA mass concentration and the ammonium-to-sulfate molar ratio using Tucson PM1.0 data between July 2012 and June 2013. The curve represents an exponential fit.