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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 14, Number 1
BKCSDE 14(1)
January 20, 1993 

The Application of Time-Resolved Laser Induced Fluorescence Spectroscopy in the Complexation Studies of Eu(Ⅲ) and Cm(Ⅲ) with Humic Substances
Joong Gill Choi*, Ka Won Oum, Chang Yeoul Choi, Hichung Moon, Hyun Sang Shin, Seung Min Park, Paul Joe Chong
The application of time-resolved laser induced fluorescence spectroscopy (TRLIF) to the complexation studies of Eu(Ⅲ) and Cm(Ⅲ) with humic substances is described. Using this method, three different spectroscopic characteristics(excitation spectra, emission spectra, and lifetimes) of these aquo ions and their complexes can be directly measured. By observing shifts in the wavelength and changes in the lifetime and intensities of the fluorescence emission, the information on the complexation behavior of humic substances with these trivalent metal cations in an aqueous solution, as well as energy transfer mechanisms, can be obtained. In addition, this method allows precise spectroscopic quantification of the complexation processes at very low concentrations of both components.
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