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Table 5 Seasonal element concentrations (average, min and max levels expressed as ng m -3 ) in PM 10 determined by INAA and IPAA in atmospheric particulate sampled in downtown Rome

From: Deep investigation on inorganic fraction of atmospheric PM in Mediterranean area by neutron and photon activation analysis

Element Summer Winter
  Average Min Max Average Min Max
Ag 0.22 0.1 0.5 0.25 0.1 0.6
Al 2900 500 5300 800 200 1600
As 6 1 15 4 1 9
Ba 60 30 120 30 5 70
Br 40 20 70 70 10 140
Ca 2200 800 4200 1200 300 2000
Cd 0.4 0.3 0.9 0.75 0.3 2
Ce 5.6 0.7 10 2 0.2 5
Cl 1300 300 3900 1400 300 4700
Co 0.7 0.4 1.2 0.5 0.1 0.9
Cr 7 4 13 16 2 38
Cs 1.2 0.6 2.2 0.6 0.2 1.3
Eu 0.08 0.04 0.14 0.03 0.01 0.07
Fe 2200 1000 3600 1100 400 2700
Hf 0.36 0.15 0.62 0.13 0.01 0.30
Hg 0.14 0.05 0.36 0.13 0.03 0.20
I 6 3 8 6 3 10
K 1120 50 1900 320 50 1000
La 5 2 9 2 0.3 4
Mg 1090 50 2700 560 200 1200
Mn 40 15 60 35 10 90
Mo 0.5 0.2 0.6 2 0.3 7
Na 1500 300 7000 730 200 3500
Ni 1.7 1 5 8 3 13
Pb 120 80 200 270 80 840
Rb 17 10 30 7 2 15
Sb 2 0.7 4 2 0.7 7
Sc 0.3 0.1 0.5 0.1 0.03 0.2
Se 0.7 0.2 1.1 0.5 0.2 1.3
Ta 0.03 0.01 0.05 0.01 0.005 0.02
Tb 0.055 0.1 0.10 0.024 0.01 0.05
Th 3 1 5 0.9 0.3 2.5
Ti 540 200 1050 265 200 500
Tl 1 0.5 2 1.4 0.5 4
U 0.4 0.1 0.7 0.2 0.06 0.4
V 8 1 15 14 8 23
Zn 110 50 260 190 50 520
Zr 50 10 90 20 5 50