'Only traffic volume' diaporamas de présentation

Platinum pollution in road dusts, roadside soils, and tree barks in Seoul, Korea

Suburbs of Seoul (control area) (2.3 ng/g) Km Road dust Tree bark Roadside soil Grinding into powder form Sieving into <75 ?m (-200 mesh) 2 g sample + 21 ml HNO 3 + 7 ml HCl 200 mg sample + 3 ml HNO 3 + 0.5 ml HCl I. 60 ? for 30 min. Heating Microwave digestion II. 140 ? for 90 min.

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