... CITED1.“Data Quality,” Section 1030 in Standard Methods for the Examination of Water and Wastewater, 20th ed., Clesceri, Lenore, S., Arnold E. Greenberg, AndrewD. Eaton, and Mary Ann H. Franson, Eds., ... chromatographySurfactants Water pollution SpectrophotometryTannin, Lignin Water quality, water pollution SpectrophotometryVanadium Water quality, water pollution ICPZinc Water quality, water pollution ... after standing may thus give erroneously low values for calcium and total hardness.Oxidation-reduction reactions may cause substantial errors in analysis. For example, soluble iron(II) and manganese(II)...