ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 38, Number 9
JKCSEZ 38(9)
June 20, 1994 

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.