Development of an Optode for Detection of Trace Amounts of Hg2+ in Different Real Samples Based on Immobilization of Novel Tetradentate Schiff Bases Bearing Two Thiol Groups in PVC Membrane

Abdel Aziz, Ayman ; Soha F. Mohammed ; Magdy M. El Gamel 


Abstract


A very sensitive and reversible optical chemical sensor based on a novel tetradentate Schiff base namely N.N(/)bis(2-aminothiophenol)benzene-1,2-dicarboxaldehyde (ATBD) immobilized within a plasticized PVC film for Hg(2+) determination is described. At optimum conditions (i.e. pH 6.0), the proposed sensor displayed a linear response to Hg(2+) over 1.0 × 10(-10) - 1.0 × 10(-2) mol L(-1) with a limit of detection of 7.23 × 10(-11) mol L(-1) (0.0145 μgL(-1)). Moreover, the results revealed that, under batch condition, the sensor is fully reversible within a response time ~ 35 s. In addition to its high stability and reproducibility, the sensor showed good selectivity towards Hg(2+) ion with respect to common metal cations. The sensor was successfully applied for determination of Hg(2+) ion in some real samples, including hair, urine and well water samples. The results were in good correlation with the data obtained using cold vapor atomic absorption spectrometry.


Other data

Issue Date 2014
Publisher SPRINGER/PLENUM PUBLISHERS
Journal Journal of Fluorescence 
URI http://research.asu.edu.eg/handle/123456789/169994
DOI 859-74
1573-4994
3
874
https://api.elsevier.com/content/abstract/scopus_id/84904040012
24
10.1007/s10895-014-1364-5


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