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

Table 5

OC versus EC minimum 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^2min	𝑛min
Las Condes^a	Cool	3.5 ± 0.2	1.92 ± 0.05	0.72	627
	Warm	2.7 ± 0.2	1.31 ± 0.06	0.51	538
P. O’Higgins^a	Cool	5.8 ± 0.3	1.20 ± 0.02	0.74	879
	Warm	2.8 ± 0.2	1.15 ± 0.03	0.54	805
Pudahuel^a	Cool	5.0 ± 0.4	1.48 ± 0.01	0.75	877
	Warm	1.7 ± 0.1	1.43 ± 0.04	0.62	801

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