title: Lanthanide luminescence quenching as a detection method in ion chromatography. Chromate in surface and drinking water.
abstract: Dynamic quenching of Eu(III) and Tb(III) luminescence by inorganic anions as a detection method in ion chromatography was investigated. To obtain a high luminescence intensity, lanthanide(III) complexes are formed with ligands which make indirect excitation of the ions possible. Only a few anions (e.g., nitrite, chromate) induce efficient dynamic luminescence quenching. Chromate is an efficient quencher of Tb-acac luminescence. Samples of tap water and surface water, spiked with chromate, were injected into a high-performance liquid chromatographic system with post-column addition of the luminescent complex. In this way, a detection limit of 1.1 . 10(-7) M (13 ppb) of chromate could be obtained.
authors.affiliation: Department of General and Analytical Chemistry, Free University, Amsterdam, The Netherlands.
authors.forename: M
authors.initials: M
authors.lastname: Schreurs
authors.forename: G W
authors.initials: GW
authors.lastname: Somsen
authors.forename: C
authors.initials: C
authors.lastname: Gooijer
authors.forename: N H
authors.initials: NH
authors.lastname: Velthorst
authors.forename: R W
authors.initials: RW
authors.lastname: Frei
mesh_terms: D002840:Chromates / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005063:Europium; D006863:Hydrogen-Ion Concentration; D008163:Luminescent Measurements; D008674:Metals, Rare Earth; D013696:Temperature; D013725:Terbium; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
chemical_list: D002840:Chromates; D008674:Metals, Rare Earth; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D013725:Terbium; D005063:Europium