Sn @ 5µg/mL, Si @ 10µg/mL, Mo @ 20µg/mL in 3% HNO3 (v/v)/tr HF, 250ml

Sn @ 5µg/mL, Si @ 10µg/mL, Mo @ 20µg/mL in 3% HNO3 (v/v)/tr HF, 250ml