Overview
This methods paper describes extraction and pre-concentration of platinum and palladium from microwave-digested road dust using ion-exchanging mesoporous silica microparticles prior to ICP-MS quantification. arsenic (As) incidental to method validation, Pt and Pd concentrations were measured in Vienna area road dust in summer and winter samples. The mesoporous silica ion exchanger showed selective recovery for Pd and Pt at adjusted HCl pH.
Key numbers
- Vienna road dust Pt range: 205-1445 ng/g
- Vienna road dust Pd range: 201-1230 ng/g
- CRM recovery: Pd 80.2 +/- 0.7 ng/g (n=4); Pt found 6.2 +/- 2.6 ng/g
- Pre-concentration factor for Pd: 3.2-4 (10 mL starting volume to 2 mL final)
- Optimal HCl pH for selective Pd and Pt extraction: 0.012-0.360 mol/L HCl
- Summer and winter seasonal comparison conducted
Methods (brief)
Microwave acid digestion of road dust followed by pH-adjusted ion exchange on mesoporous silica microparticles. Elution and ICP-MS quantification. CRM validation. Pre-concentration factor calculated from volume reduction. Seasonal comparison between summer and winter road dust samples.
Implications
This page makes the source discoverable for palladium evidence routing. Provides Vienna road dust Pd concentrations alongside a validated analytical method for low-level Pd determination, with seasonal data relevant for understanding temporal variability in traffic-related Pd deposition.
Related evidence
Update history
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