Health effects of multi-pollutant profiles

. Author manuscript; available in PMC: 2015 Apr 2.

Published in final edited form as: Environ Int. 2014 Jun 17;71:13–19. doi: 10.1016/j.envint.2014.05.023

Normalized Concentration

	$N C_{i j} = \frac{\bar{S_{𝒾 𝒿}}}{\bar{P M_{2.5 𝒾}}} \div \frac{\bar{S_{𝒿}}}{\bar{P M_{2.5}}}$
Where:	NC_ij represents the Normalized Concentration of species i in cluster j
	S_ij represents the mean Species Concentration j (Fe, OC, Na⁺, etc.) in cluster i
	S_j represents the mean Species Concentration over all clusters
	PM_2.5 represents the concentration of PM_2.5