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. Author manuscript; available in PMC: 2017 Mar 1.
Published in final edited form as: Atmos Environ (1994). 2016 Mar;128(March 2016):235–245. doi: 10.1016/j.atmosenv.2015.12.067

Table 2.

Diagnostic ratios of PM2.5 chemical species during the sampling period and samples with high contributions of the three retained factors by PMF.

OC/EC K+/K
2012–2014 6.51 ± 0.37 0.86 ± 0.08
Sampling days 6.31 ± 0.29 0.70 ± 0.05
Factor 1 5.35 ± 0.73 0.93 ± 0.16
Factor 2 6.32 ± 0.70 0.61 ± 0.06
Factor 3 6.62 ± 1.10 0.68 ± 0.07