Environmental Sciences Europe

Table 3 Correlation coefficients of elements and NO₂ at 20 outdoor sites

From: Indoor monitoring of heavy metals and NO₂ using active monitoring by moss and Palmes diffusion tubes

	Al	Cr	Cu	Zn	Sn	Cd	Pb	Mo	Sb
Cr	0.907***
Cu	0.845*	0.849***
Zn	0.452*	0.441	0.484*
Sn	0.705**	0.858***	0.731**	0.455*
Cd	0.007	0.122	-0.056	0.578**	0.288
Pb	0.459*	0.523*	0.387	0.662***	0.616**	0.499*
Mo	0.382	0.579*	0.482*	0.508*	0.806***	0.446	0.579*
Sb	0.621**	0.789***	0.673**	0.499*	0.847***	0.191	0.423	0.752***
NO₂	0.069	0.214	0.209	0.386	0.294	0.062	0.137	0.261	0.552*

Significances given as: p < 0.001***, p < 0.01**, p < 0.05*

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