determination of pH, dissolved oxygen, electric conductivity, chemical oxygen demand-Cr (COD), concentration of ammonium cation, nitrite, nitrate, ferrous and ferric ions, chloride, phosphate, sulfate, acid neutralizing capacity, sulfides, manganese, total dissolved solids (TDS), total suspended solids, and all substances dissolved in water or aqueous extracts
determination of pH, calcium & magnesium, chemical oxygen demand-Mn (COD), concentration of ammonium cation, nitrite, nitrate, ferrous and ferric ions, chloride, sulfate, and manganese in potable water