Table 1

Components included in the analysis In-vehicle concentrations of the elemental components of PM2.5 and gaseous co-pollutants included in the analysis (n = 36 samples): Arithmetic average, standard deviation and correlation (Spearman-Rho) to PM2.5Mass and PM2.5Lightscatter. *) p < 0.05.
Component
 Average
 Standard Deviation
 Correlation to PM2.5Mass
 Correlation to PM2.5Lightscatter
Benzene (ppb)
 3.73
 2.9
 0.50 *
 0.31 *
Aldehydes (μg/m3)
 34.6
 14.9
 0.34 *
 0.52 *
CO (ppm)
 2.6
 1.1
 0.52 *
 0.52 *
Aluminum (Al, ng/m3)
 66.0
 54.5
 0.58 *
 0.31 *
Silicon (Si, ng/m3)
 240.0
 542.0
 0.66 *
 0.23
Sulfur (S, ng/m3)
 1703.0
 812.0
 0.58 *
 0.88 *
Calcium (Ca, ng/m3)
 48.2
 33.5
 0.37 *
 0.22
Titanium (Ti, ng/m3)
 11.7
 10.0
 0.41 *
 0.15
Chromium (Cr, ng/m3)
 2.1
 1.7
 0.51 *
 0.32 *
Iron (Fe, ng/m3)
 371.0
 352.0
 0.71 *
 0.33 *
Copper (Cu, ng/m3)
 33.1
 18.8
 0.16
 0.50 *
Selenium (Se, ng/m3)
 12.6
 1.2
 0.38 *
 0.26
Tungsten (W, ng/m3)
 5.6
 5.9
 0.37 *
 0.39 *
PM2.5Mass (μg/m3)
 23.0
 8.0
 1
 0.71 *
PM2.5Lightscatter (μg/m3)
 24.1
 13.5
 0.71 *
 1

Riediker et al. Particle and Fibre Toxicology 2004 1:2   doi:10.1186/1743-8977-1-2