Abstract
Platinum concentrations in road dusts and urban river sediments were analysed by dry-ash digestion followed by adsorptive stripping voltammetry. The analysis gave a detection limit of 0.5 ng/g, with up to 85% recovery of added platinum and a standard deviation of ±2.2%. A comparison of platinum concentrations in size-fractionated road dusts collected in 1984 and 1991 showed average increases in all fractions: <63 μm, 3.0-8.9 ng/g; 63-125 μm, 1.5-3.6 ng/g; and 125-1000 μm, <0.5-2.8 ng/g. Present-day surface loadings of platinum were calculated for a car park (26 ng/m2) and a kerbside (1.28 μg/m2), and mean event platinum concentrations in highway run-off were calculated to be 0.1-0.7 ng/l. Concentrations of platinum in urban river sediments varied from <0.5 to 2.2 ng/g.
| Original language | English |
|---|---|
| Pages (from-to) | 169-174 |
| Number of pages | 6 |
| Journal | Science of the Total Environment |
| Volume | 146-147 |
| Issue number | C |
| DOIs | |
| Publication status | Published - 23 May 1994 |
| Externally published | Yes |
Keywords
- Adsorptive stripping
- Platinum
- Road sediments
- Voltammetry