title: Liquid chromatography of lanthanide chelates of 1-(p-nitrophenyl)ethylenediamine-N,N,N',N' -tetra-acetic acid.
abstract: Preparation of the chelating agent, 1-(p-nitrophenyl)ethylenediamine-N,N,N',N'-tetra-acetic acid (p-nitrophenylEDTA), is described in detail. Separation of p-nitrophenylEDTA chelates of ytterbium(III), erbium(III), dysprosium(III) and europium(III) has been achieved by reversed-phase ion-pair liquid chromatography. With spectrophotometric detection at 254 nm, linear responses over about four orders of magnitude were achieved with detection limits (S/N = 2) of about 0.5 pmole.
authors.affiliation: Department of Chemistry, University of Wyoming, Laramie, WY 82071, USA.
authors.forename: O
authors.initials: O
authors.lastname: Mulero
authors.forename: D A
authors.initials: DA
authors.lastname: Nelson
authors.forename: V S
authors.initials: VS
authors.lastname: Archer
authors.forename: G
authors.initials: G
authors.lastname: Miknis
authors.forename: J R
authors.initials: JR
authors.lastname: Beckett
authors.forename: H L
authors.initials: HL
authors.lastname: McLean