title: A Novel Fluorimetric Bulk Optode Membrane Based on NOS Tridentate Schiff Base for Selective Optical Sensing of Al3+Ions.
abstract: A novel fluorimetric optode has been developed for the highly selective and sensitive for the determination of ultra trace amounts of Al3+ions. The proposed fluorescent optode is based on the incorporation of a simple and effective fluorescent sensor tridentate NOS Schiff base N-(2-hydroxynaphthylidene)-2-aminothiophenol (H2L) in a plasticized PVC containing KTpClPB as a lipophilic anionic additive. H2L was synthesized by a facile one-step Schiff base reaction. The plasticized PVC-membrane displays a calibration response for Al3+ions over a wide concentration range from 1.0 × 10-9to 4.4 × 10-3mol/L. The fluorescence signal of the optode membrane can be easily recovered by immersion in 0.01 M EDTA. In addition to high stability and reproducibility, the sensor shows a unique selectivity towards Al3+ion with respect to common co-existing cations, particularly Ga3+and In3+. The proposed optode was applied successfully for determination of Al3+in some real samples, including bottled drinking waters, bottled mineral waters and soft drinks.
authors: Department of Chemistry, Faculty of Science, Ain Shams University, Cairo, 11566, Egypt.
authors: Ayman A
authors: AA
authors: Abdel Aziz
authors: Department of Chemistry, Faculty of Science, Fayoum University, El-Fayoum, 63514, Egypt.
authors: Rania G
authors: RG
authors: Mohamed
authors: Department of Chemistry, Faculty of Science, Fayoum University, El-Fayoum, 63514, Egypt.
authors: Fatma M
authors: FM
authors: Elantabli
authors: Department of Chemistry, Faculty of Science, Fayoum University, El-Fayoum, 63514, Egypt. smm07@fayoum.edu.eg.
authors: Samir M
authors: SM
authors: El-Medani
mesh_terms: D000535:Aluminum / Q000032:analysis*; D000814:Aniline Compounds / Q000737:chemistry*; D015374:Biosensing Techniques; D061545:Carbonated Water / Q000032:analysis; D060766:Drinking Water / Q000032:analysis; D005456:Fluorescent Dyes; D005470:Fluorometry / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D008567:Membranes, Artificial; D008900:Mineral Waters / Q000032:analysis; D055095:Optics and Photonics; D011143:Polyvinyl Chloride; D015203:Reproducibility of Results; D012545:Schiff Bases / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D061545:Carbonated Water; D060766:Drinking Water; D005456:Fluorescent Dyes; D008567:Membranes, Artificial; D008900:Mineral Waters; D012545:Schiff Bases; C005464:2-aminothiophenol; D011143:Polyvinyl Chloride; D000535:Aluminum
keywords: Al3+ ion; NOS Schiff base; Optode membrane