title: Separation of some transition-metal ions on silica-immobilized 2-pyridinecarboxaldehyde phenylhydrazone.
abstract: A metal-ion extractant, prepared by chemical binding of 2-pyridinecarboxaldehyde phenylhydrazone on a silica support, is described and shown to be effective for use in separation and determination of trace amounts of iron, cobalt, nickel, and copper. Metal-ion sorption conforms to the Langmuir isotherm. The relative orders of the Langmuir constants K and the column retention-capacity factors k' for the four transition-metal ions are the same as the natural order of the stabilities predicted for their metal chelates: Fe(II) < Co(II) < Ni(II) < Cu(II).
authors.affiliation: Department of Chemistry, Northern Illinois University, DeKalb, IL 60115, U.S.A.
authors.forename: S
authors.initials: S
authors.lastname: Watanesk
authors.forename: A A
authors.initials: AA
authors.lastname: Schilt