Characteristics of Atmospheric Metalliferous Particles during Large-Scale Fireworks in Korea

Table 3

Correlation between elements over the study period in 2012 (Oct. 27–Oct. 29)–2013 (Oct. 25–Oct. 27).

(a) 2012

	Pb	Cd	Cr	Cu	As	Al	K	Na	Ca	Sr
Pb		—	0.722	0.908	—	0.847	0.469	−0.366	0.795	0.669
Cd			—	—	—	—	—	—	—	—
Cr				0.462	—	0.615	0.513	−0.428	0.564	0.295
Cu					—	0.832	0.299	−0.300	0.801	0.737
As						—	—	—	—	—
Al							0.535	−0.516	0.987	0.808
K								−0.088	0.513	0.521
Na									−0.419	0.051
Ca										0.869
Sr

—: correlation coefficients between Cd, As, and other elements were not available due to being below detection limit levels for Cd and As.

(b) 2013

	Pb	Cd	Cr	Cu	As	Al	K	Na	Ca	Sr
Pb		—	−0.034	0.547	—	0.174	0.395	0.106	0.135	0.366
Cd			—	—	—	—	—	—	—	—
Cr				0.522	—	0.362	0.574	0.504	0.145	0.496
Cu					—	−0.096	0.468	0.179	−0.131	0.379
As						—	—	—	—	—
Al							0.500	0.827	0.934	0.445
K								0.722	0.333	0.946
Na									0.756	0.613
Ca										0.286
Sr

—: correlation coefficients between Cd, As, and other elements were not available due to being below detection limit levels for Cd and As.