Table 1

 Percentages detected per sample type for Amsterdam and Helsinki (percentages <50 in bold)

AmsterdamHelsinki
Indoor (n = 220)Outdoor (n = 228)Personal (n = 225)Indoor (n = 233)Outdoor (n = 168)Personal (n = 238)
S100%100%100%100%100%100%
Zn100%100%99%100%100%100%
Fe100%100%100%100%100%100%
K100%100%100%100%100%98%
Ca100%100%100%100%99%97%
Cu100%100%98%100%98%100%
Ni97%100%83%100%99%55%
Pb89%96%75%100%83%88%
Cl80%88%58%85%71%54%
Mn93%95%66%91%95% 45%
Si78% 42% 52%89%65%89%
V 40% 63% 8% 62%75%52%
Al52% 41% 52% 24% 64% 20%
Br 47% 71% 9% 30% 42% 46%
Cr 18% 16% 3% 9% 8% 30%
Ti 16% 19% 2% 12% 15% 32%