Determination of Cd(II) Ions by using Cyclodextrin-BasedPolymeric Fluorescence Sensor

Abstract

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In this study, Cd(II) ion was determined using a cyclodextrin-based polymeric fluorescence sensor prepared by UV-curing technique. The effects of several parameters such as pH, time, and coexisting ions on the fluorescence intensity were also examined. The excitation and emission wavelengths were found to be 374 nm and 422 nm, respectively. The measurement range was in the range of 4.45x10-9 mol L-1 to 4.45x10-8mol L-1 for Cd(II) ions and the detection limit was calculated as 6.23×10-10 mol L-1. In addition, sensor membrane was selective which was not influenced by common coexisting metal ions. The concentrations of the foreign ions such as Pb(II), Co(III), Ag(I), Zn(II), Cu(II), Cr(III) are 1000-fold higher than Cd(II) ions. Besides the prepared polymeric fluorescence sensor was successfully implemented to the determination of Cd(II) ions in biscuit and tap water samples