title: Luminometric Label Array for Quantification and Identification of Metal Ions.
abstract: Quantification and identification of metal ions has gained interest in drinking water and environmental analyses. We have developed a novel label array method for the quantification and identification of metal ions in drinking water. This simple ready-to-go method is based on the nonspecific interactions of multiple unstable lanthanide chelates and nonantenna ligands with sample leading to a luminescence signal profile, unique to the sample components. The limit of detection at ppb concentration level and average coefficient of variation of 10% were achieved with the developed label array. The identification of 15 different metal ions including different oxidation states Cr(3+)/Cr(6+), Cu(+)/Cu(2+), Fe(2+)/Fe(3+), and Pb(2+)/Pb(4+) was demonstrated. Moreover, a binary mixture of Cu(2+) and Fe(3+) and ternary mixture of Cd(2+), Ni(2+), and Pb(2+) were measured and individual ions were distinguished.
authors.affiliation: Laboratory of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku , Vatselankatu 2, 20500 Turku, Finland.|Department of Cell Biology and Anatomy, Institute of Biomedicine, University of Turku , Kiinamyllynkatu 10, 20520 Turku, Finland.
authors.forename: Sari
authors.initials: S
authors.lastname: Pihlasalo
authors.affiliation: Department of Information Technology, University of Turku , Vesilinnantie 5, 20500 Turku, Finland.
authors.forename: Ileana
authors.initials: I
authors.lastname: Montoya Perez
authors.affiliation: Department of Cell Biology and Anatomy, Institute of Biomedicine, University of Turku , Kiinamyllynkatu 10, 20520 Turku, Finland.
authors.forename: Niklas
authors.initials: N
authors.lastname: Hollo
authors.affiliation: Department of Cell Biology and Anatomy, Institute of Biomedicine, University of Turku , Kiinamyllynkatu 10, 20520 Turku, Finland.
authors.forename: Elina
authors.initials: E
authors.lastname: Hokkanen
authors.affiliation: Department of Information Technology, University of Turku , Vesilinnantie 5, 20500 Turku, Finland.
authors.forename: Tapio
authors.initials: T
authors.lastname: Pahikkala
authors.affiliation: Laboratory of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku , Vatselankatu 2, 20500 Turku, Finland.|Department of Cell Biology and Anatomy, Institute of Biomedicine, University of Turku , Kiinamyllynkatu 10, 20520 Turku, Finland.
authors.forename: Harri
authors.initials: H
authors.lastname: Härmä