Detection of trace amounts of Hg2+ in different real samples based on immobilization of novel unsymmetrical tetradentate Schiff base within PVC membrane

Abdel Aziz, Ayman, Sabry H. Seda,

Abstract


A novel fluorescence optical sensor for sensitive and selective determination of Hg2+ions in aqueous solution has been prepared. The sensing system is made of a novel unsymmetrical tetradentate Schiff base namely N-(2-hydroxyphenyl)-N′-(2-mercaptophenyl)-o-phthalylidene (HMP), as a neutral Hg2+-selective fluoroionophore immobilized in a plasticized PVC membrane containing potassium tetrakis-(4-chlorophenyl) borate (KTpClPB) as a lipophilic anionic additive. The response of the optode is based on the strong fluorescence enhancement of HMP upon exposure to Hg2+ions. Under the optimum conditions, the proposed sensor displays a linear response in concentration range of 2.27 × 10-11to 1.13 × 10-3mol/L, with a detection limit of 9.57 × 10-12mol/L. Furthermore, the proposed optode displays a good selectivity toward Hg2+ions in comparison with common coexisting cations. The sensor was applied successfully for determination of mercury ions in different real samples. © 2014 Elsevier B.V.


Other data

Title Detection of trace amounts of Hg2+ in different real samples based on immobilization of novel unsymmetrical tetradentate Schiff base within PVC membrane
Authors Abdel Aziz, Ayman ; Sabry H. Seda 
Issue Date 2014
Publisher ELSEVIER SCIENCE SA
Journal Sensors and Actuators B: Chemical 
DOI 155
163
http://www.scopus.com/inward/record.url?eid=2-s2.0-84896508187&partnerID=MN8TOARS
197
10.1016/j.snb.2014.02.074
Scopus ID 2-s2.0-84896508187
Web of science ID WOS:000334753200022

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