Both, build-up solids and soil samples were tested for Iron (Fe),
Aluminium (Al), Lead (Pb), Zinc (Zn), Cadmium (Cd), Chromium
(Cr), Manganese (Mn), Nickel (Ni) and Copper (Cu) (Method
200.8, US EPA, 1994). According to research literature, these heavy
metals are among the most common in dust build-up on road surfaces
(Herngren et al., 2006). Nitric acid (HNO3) digestion for heavy
metals extraction was carried according to the Method 200.8 (US
EPA, 1994). Precision and accuracy of analysis and the digestion
procedure was monitored using internal standards, certified reference
material and quality control blanks. Multi-element standards
supplied by Accustandard were used as calibration standards. Multi-
element standards from Sigma–Aldrich were used as the certified
reference material. The percentage recovery was in the range
of 85–115%, which is within the specified limits.
Both, build-up solids and soil samples were tested for Iron (Fe),Aluminium (Al), Lead (Pb), Zinc (Zn), Cadmium (Cd), Chromium(Cr), Manganese (Mn), Nickel (Ni) and Copper (Cu) (Method200.8, US EPA, 1994). According to research literature, these heavymetals are among the most common in dust build-up on road surfaces(Herngren et al., 2006). Nitric acid (HNO3) digestion for heavymetals extraction was carried according to the Method 200.8 (USEPA, 1994). Precision and accuracy of analysis and the digestionprocedure was monitored using internal standards, certified referencematerial and quality control blanks. Multi-element standardssupplied by Accustandard were used as calibration standards. Multi-element standards from Sigma–Aldrich were used as the certifiedreference material. The percentage recovery was in the rangeof 85–115%, which is within the specified limits.
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