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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 23, Number 10
BKCSDE 23(10)
October 20, 2002 

Spectrofluorimetric Determination of Oxalate Based on Its Ternary Complex between Eu 3+ and Thenoyltrifluoroacetone
Ki Won Cha, Hua Zi Huang, Hyun Cheol Choi
Oxalate, Eu3+, Thenoyltrifluoroacetone (TTA), Fluorescence, Enhancement
A simple, sensitive and selective determination method of oxalate has been investigated based on the fluorescence enhancement of Eu3+ -TTA complex due to the formation of Eu3+ -TTA-oxalate ternary complex. An emission peak of Eu3+ -TTA, which is increased linearly with addition of oxalate, occurs at 610 nm in aqueous solution with excitation at 306 nm. The linear range of the calibration curve is 1 ×10-6 -8 ×10-6 M and the detection limit is 1 ×10-6 M. The effects of foreign ions were studied. The present method was applied to determine oxalate of two synthetic samples.
1456 - 1458
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