A highly selective and sensitive fluorescent sensor for the determination of uranyl ion is developed. The sensing membrane was prepared by incorporating 5-(9-anthracenylmethyl)-5-aza-2,8-dithia[9],(2,9)-1,10- phenanthrolinophane as fluoroionophore in the plasticized poly(vinyl chloride) membrane containing 2- nitrophenyloctylether as plasticizer. The proposed sensor displays a wide linear response range of 1.0 x 10-10 to 1.0 x 10-3 M with a low limit of detection of 2.7 x 10-11 M in solution at pH 4.0. This sensor has a relatively fast response time of less than three min. In addition to high stability and reproducibility, it shows a unique selectivity towards uranyl ion with respect to common coexisting cations. The sensor can be regenerated by exposure to a solution of ethylene diamine tetraacetic acid. The proposed sensor was then applied to the determination of uranyl in water samples with satisfactory results

Highly selective and sensitive fluorescence optode membrane for uranyl ion based on 5-(9-anthracenylmethyl)-5-aza-2,8-dithia[9],(2,9)-1,10-phenanthrolinophane

GARAU, ALESSANDRA;LIPPOLIS, VITO
2015

Abstract

A highly selective and sensitive fluorescent sensor for the determination of uranyl ion is developed. The sensing membrane was prepared by incorporating 5-(9-anthracenylmethyl)-5-aza-2,8-dithia[9],(2,9)-1,10- phenanthrolinophane as fluoroionophore in the plasticized poly(vinyl chloride) membrane containing 2- nitrophenyloctylether as plasticizer. The proposed sensor displays a wide linear response range of 1.0 x 10-10 to 1.0 x 10-3 M with a low limit of detection of 2.7 x 10-11 M in solution at pH 4.0. This sensor has a relatively fast response time of less than three min. In addition to high stability and reproducibility, it shows a unique selectivity towards uranyl ion with respect to common coexisting cations. The sensor can be regenerated by exposure to a solution of ethylene diamine tetraacetic acid. The proposed sensor was then applied to the determination of uranyl in water samples with satisfactory results
Uranyl ion, Fluorescence, Optode
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/173503
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