Carbonaceous Aerosols in Fine Particulate Matter of Santiago Metropolitan Area, Chile

Table 4

OC versus EC linear correlation in PM_2.5 for the stations studied in the period from 2002 to 2007. 𝑎 is the slope, 𝑏 (adim) is the intercept (𝜇g/m³), 𝑅² is the square of the correlation coefficient, and 𝑛 is the number of data pairs.

Site	Period	OC(𝑦) = 𝑎 + bEC(𝑥)
		Intercept, 𝑎 (𝜇g m^−3)	Slope, 𝑏 (adim)	𝑅^2	𝑛
Las Condes^a	Cool	4.19 ± 0.05	2.48 ± 0.01	0.68	12907
	Warm	3.74 ± 0.03	1.93 ± 0.02	0.48	11853
P. O’Higgins^a	Cool	6.60 ± 0.07	1.35 ± 0.01	0.64	18745
	Warm	3.63 ± 0.02	1.30 ± 0.01	0.47	17165
Pudahuel^a	Cool	7.04 ± 0.09	1.80 ± 0.01	0.62	17882
	Warm	2.98 ± 0.06	1.90 ± 0.01	0.49	19603

aLabel of the stations in Figure 1. Las Condes: C Label, P. O’Higgins: O Label, and Pudahuel: P Label.