Ammonium
NH4+
Nitrate
NO3-
Nitrite
NO2-
Acetate
C2H3O2- or CH3COO-
Hydroxide
OH-
Cyanide
CN-
Chlorate
ClO3-
Chlorite
ClO2-
Perchlorate
ClO4-
Bicarbonate
HCO3-
Carbonate
CO3(2-)
Chromate
CrO4(2-)
Sulfate
SO4(2-)
Dichromate
Cr2O7(2-)
Sulfite
SO3(2-)
Phosphate
PO4(3-)
Borate
BO3(3-)