Cr @ 1000 µg/mL in 5% HCl, 100ml

PE ICV Std, 5pct HNO3/tr Tartic, 500ml

Si @ 10000 µg/mL in H2O, tr. F-, 100ml

Silver (Ag) standard, 1000µg/mL, in 5% HNO3, 100ml