title: 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.
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.
authors: Department of Chemistry, Faculty of Science, Ain Shams University, 11566, Cairo, Egypt, aymanaziz31@gmail.com.
authors: Ayman A Abdel
authors: AA
authors: Aziz
authors: Soha F
authors: SF
authors: Mohammed
authors: Magdy M
authors: MM
authors: El Gamel
mesh_terms: D015374:Biosensing Techniques; D006197:Hair / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D017736:Ion-Selective Electrodes; D008567:Membranes, Artificial; D008628:Mercury / Q000032:analysis*; D011143:Polyvinyl Chloride / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D014556:Urine / Q000737:chemistry; D014881:Water Supply / Q000032:analysis
chemical_list: D008567:Membranes, Artificial; D012545:Schiff Bases; D013438:Sulfhydryl Compounds; D011143:Polyvinyl Chloride; D008628:Mercury