Sulfate (SO4-2), 1000µg/ml in Water, 500ml

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

Total Cyanide (CN-), 100µg/ml in in H2O/NaOH,100ml

Ni @ 1000 µg/mL in 5% HNO3, 100ml