Cr @ 1000 µg/mL in 5% HCl, 100ml

Ni @ 1000 µg/mL in 5% HNO3, 100ml

Nitrite Standard: NO2-, 1000µg/mL iin Water, 100ml

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