Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10528894 | Analytica Chimica Acta | 2005 | 8 Pages |
Abstract
A novel fluorescence chemical sensor for the highly sensitive and selective determination of mercury(II) ions in aqueous solutions is prepared. The mercury sensing system was prepared by incorporating 1-(dansylamidopropyl)-1-aza-4,10-dithia-7-oxacyclododecane (L) as a neutral Hg2+-selective fluoroionophore in the plasticized PVC membrane containing potassium tetrakis(p-chlorophenyl)-borate as a liphophilic anionic additive. The response of the sensor is based on the strong fluorescence quenching of L by Hg2+ ions. At a pH 3.3, the proposed sensor displays a calibration curve over a wide concentration range of 1.0Â ÃÂ 10â4 to 5.0Â ÃÂ 10â12Â M, with a relatively fast response time of less than 1Â min. In addition to high stability and reproducibility, the sensor shows a unique selectivity towards Hg2+ ion with respect to common coexisting cations. The proposed fluorescence optode was applied to the determination of mercury content of amalgam alloy, hair and well water samples.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Mojtaba Shamsipur, Morteza Hosseini, Kamal Alizadeh, Naader Alizadeh, Abdollah Yari, Claudia Caltagirone, Vito Lippolis,