Determination of Interesting Toxicological Elements in PM_2.5 by Neutron and Photon Activation Analysis

Table 4

Grouping of elements in PM₁₀ according to the summer/winter ratio seasonal average.

Ratio >2	Ratio ~1	Ratio <1
Al, Ba, Ca, Ce, Cs, Eu, Fe, Hf, K, La, Mg, Na, Rb, Sc, Ta, Tb, Th, Ti, U, Zr	Ag, As, Br, Cl, Co, Hg, I, Mn, Sb, Se, Tl	Cd, Cr, Mo, Ni, Pb, V, Zn