Nitrate (NO3-) as N, 1000µg/mL in Water, 100ml

Aluminum Standard: Al @ 1000 µg/mL in 5% HNO3, 100mL

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

Cr, 1000 µg/mL in 5% HNO3, 100ml