AJAC  Vol.5 No.17 , December 2014
The Analysis of the Quenching Efficiency of Humic Acid Fluorescence by Cadmium and Copper Ions
Abstract: In conditions of monochromatic excitation (λexc=337.1), the spectral dependence of the efficiency of fluorescence quenching αλ of humic acids samples by Cd2+ and Cu2+ ions was studied. The difference of αλ dependencies for these ions was established. In the spectral range 350 - 650 nm, changes of the αλ for Cd2+ ion are markedly different from the magnitude for changes αλ, which occur for ion Cu2+. The interpretation of mismatch dependences obtained αλ ions Cd2+ and Cu2+ is carried out within the concept of the availability of different sites, due to the difference in ionic radii (0.108 nm and 0.08 nm for Cd2+ and Cu2+, respectively).
Cite this paper: Lavrik, N. and Mulloev, N. (2014) The Analysis of the Quenching Efficiency of Humic Acid Fluorescence by Cadmium and Copper Ions. American Journal of Analytical Chemistry, 5, 1167-1173. doi: 10.4236/ajac.2014.517123.

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