Cr, 1000 µg/mL in 5% HNO3, 100ml

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

Total Cyanide (CN-), 1000µg/ml in in H2O/NaOH,100m

Chloride (Cl-), 1000µg/mL in Water, 100ml