title: Tris(4,7-dihydroxy-1,10-phenanthroline)iron(II) as a low-potential oxidation-reduction indicator: determination of hydrosulphite.
abstract: The formal reduction potential of the tris(4,7-dihydroxy-1,10-phenanthroline)iron(III,II) couple is -0.06 V in the pH range 10-13, not -0.11 V as reported earlier. The couple forms an excellent visual oxidation-reduction indicator for the titration of sodium hydrosulphite with potassium ferricyanide in alkaline solution.
authors.affiliation: Department of Chemistry, Iowa State University, Ames, Iowa 50011, U.S.A.
authors.forename: D P
authors.initials: DP
authors.lastname: Poe
authors.forename: H
authors.initials: H
authors.lastname: Diehl