title: Ion-interaction chromatography of several metallocyanide complexes stabilized by adding cyanide in a neutral mobile phase.
abstract: Standard solutions (at 10(-5) M levels) of Cu(I)- and Fe(II)-cyanide complexes were stabilized for at least 5 h using 0.5 mM cyanide solution (around pH 9) as a medium. Complexes of Cu(I)- and Fe(III)-cyanide also could be stabilized without any dissociation by adding 1 mM cyanide to an acetonitrile-water (18:82, v/v) mobile phase (pH 7.0) containing 10 mM tetra-n-propylammonium salt (TPA). Under the optimal conditions, the six complexes of Cu(I)-, Ag(I)-, Ni(II)-, Fe(II)-, Fe(III)- and Au(I)-cyanides were resolved from their mixtures within about 45 min, with well-shaped chromatographic peaks.
authors.affiliation: Department of Chemistry, School of Science, Tokai University, Japan. yamiura@keyaki.cc.u-tokai.ac.jp
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Miura
authors.forename: Norihito
authors.initials: N
authors.lastname: Takenami
authors.forename: Paul R
authors.initials: PR
authors.lastname: Haddad