title: Fluorometric selective detection of fluoride ions in aqueous media using Ag doped CdS/ZnS core/shell nanoparticles.
abstract: The presence of fluoride ions in drinking water plays an important role in human health. For that reason, maintaining the optimum concentration of fluoride ions in drinking water is essential, as both low and excess (above the permissible level) concentrations can cause different health problems, such as fluorosis, urolithiasis, kidney failure, cancer, and can even lead to death. So, development of a simple and low cost method for the detection of fluoride ions in water is highly desirable. In this study, a fluorometric method based on Ag-CdS/Ag-ZnS core/shell nanoparticles is developed for fluoride ion detection. The method was tested in aqueous solution at different pH values. The selectivity and sensitivity of the fluorescence probe was checked in the presence of other anions (Cl(-), Br(-), I(-), NO3(-) SO4(2-), HCO3(-), HPO4(2-), CH3COO(-), and H2PO4(-)) and found there is no significant interference of these associated ions. The fluoride ion concentration was varied in the range 190-22 800 μg L(-1) and a lower detection limit was obtained as 99.7 μg L(-1).
authors.affiliation: Interfaces and Nanomaterials Laboratory, Department of Chemical Engineering, National Institute of Technology, Rourkela 769008, Orissa, India. sparia@nitrkl.ac.in santanuparia@yahoo.com.
authors.forename: Siddhartha Sankar
authors.initials: SS
authors.lastname: Boxi
authors.affiliation: Interfaces and Nanomaterials Laboratory, Department of Chemical Engineering, National Institute of Technology, Rourkela 769008, Orissa, India. sparia@nitrkl.ac.in santanuparia@yahoo.com.
authors.forename: Santanu
authors.initials: S
authors.lastname: Paria
mesh_terms: D000838:Anions; D019187:Cadmium Compounds / Q000737:chemistry; D002138:Calibration; D060766:Drinking Water / Q000032:analysis; D005456:Fluorescent Dyes / Q000737:chemistry; D005459:Fluorides / Q000032:analysis* / Q000592:standards; D005470:Fluorometry / Q000592:standards; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D012834:Silver / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry; D017967:Zinc Compounds / Q000737:chemistry
chemical_list: D000838:Anions; D019187:Cadmium Compounds; D060766:Drinking Water; D005456:Fluorescent Dyes; D007477:Ions; D013440:Sulfides; D017967:Zinc Compounds; C034939:cadmium sulfide; D012834:Silver; C031238:zinc sulfide; D005459:Fluorides