title: Potentiometric determination of NTA, EDTA and DTPA in mixtures.
abstract: Consecutive potentiometric determination of EDTA and NTA or DTPA and NTA is described. The method is based on the titration with iron(III) chloride at pH 4-5 in the presence of a small amount of ferroin and 1,10-phenanthroline which keeps the concentration of free iron(II) ions constant, thus making the potential dependent only on the free iron(III) concentration.
authors.affiliation: Laboratory for Analytical Chemistry J. Heyrovský Polarographic Institute Prague 1, Jilská 16, Czechoslovakia.
authors.forename: J
authors.initials: J
authors.lastname: Horácek
authors.forename: R
authors.initials: R
authors.lastname: Pribil