title: Highly Selective and Ultrasensitive Turn-on Luminescence Chemosensor for Mercury (II) Determination Based on the Rhodamine 6G Derivative FC1 and Au Nanoparticles.
abstract: A method for the detection and quantitation of Hg2+ in aqueous samples by fluorescence spectroscopy is presented. It consists of a turn-on sensor developed by coupling Gold nanoparticles (AuNPs) with the rhodamine 6G derivative FC1, in which the response is generated by a mercury-induced ring-opening reaction. The AuNPs were included in order to improve the sensitivity of the method towards the analyte, maintaining its high selectivity. The method was validated in terms of linearity, precision and accuracy, and applied to the quantitation of Hg2+ in Milli-Q and tap water with and without spiked analyte. The limit of detection and quantitation were 0.15 μg·L-1 and 0.43 μg·L-1, respectively, constituting a substantial improvement of sensitivity in comparison with the previously reported detection of Hg2+ with free FC1.
authors: Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Universidad Nacional del Litoral, CONICET, FBCB, Ciudad Universitaria, Santa Fe 3000, Argentine. rbrasca@fiq.unl.edu.ar.
authors: Romina
authors: R
authors: Brasca
authors: Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Universidad Nacional del Litoral, CONICET, FBCB, Ciudad Universitaria, Santa Fe 3000, Argentine. celeste.onaindia@gmail.com.
authors: María C
authors: MC
authors: Onaindia
authors: Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Universidad Nacional del Litoral, CONICET, FBCB, Ciudad Universitaria, Santa Fe 3000, Argentine. hgoico@fbcb.unl.edu.ar.
authors: Héctor C
authors: HC
authors: Goicoechea
authors: Department of Analytical Chemistry and IACYS, University of Extremadura, Badajoz 06006, Spain. arsenio@unex.es.
authors: Arsenio Muñoz de la
authors: AM
authors: Peña
authors: Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Universidad Nacional del Litoral, CONICET, FBCB, Ciudad Universitaria, Santa Fe 3000, Argentine. mculzoni@fbcb.unl.edu.ar.
authors: María J
authors: MJ
authors: Culzoni
keywords: Au nanoparticles; Hg2+ chemosensor; aqueous solution; fluorimetric assay; rhodamine 6G derivative