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KMID : 1059519940380090653
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Journal of the Korean Chemical Society
1994 Volume.38 No. 9 p.653 ~ p.659
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Precision Analysis of Lanthanides by Fluorescence Spectroscopy Part one : Flourimetric Determination of Rare Earths by Ternary Complexes of TTA, n-Octanol and Triton X-100
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Cha Ki-Won
Park Kwang-Won
Ha Young-Gu
Kim Ha-Suck
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Abstract
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The fluorescence intensities of europium and samarium can be greatly enhanced in the presence 2-thenoyltrifluoroacetone(TTA), n-octanol and Triton X-100 in aqueous solution of pH 7. It was also found that the fluorescence intensity can be greatly increased by the addition of excess of La3+. The excitation and emission wavelengths of europium and samarium were 345 nm, 380 nm and 617 nm, 567 nm, respectively. The fluorescence intensity was a linear function of the concentration of europium and samarium in the range 1 ×10-7 ∼ 1 × 10-9 M, 1 × 10-5 ∼ 1×10-7 M, respectively, and the detection limits were 1 × 10-11 M for europium and 1 × 10-8 M for samarium and the luminescence mechanism of the system is discussed.
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KEYWORD
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