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Voltammetric study of europium(III) in the presence of 2-thenoyltrifluoroacetone

A linear-sweep, normal-pulse and square-wave voltammetric study was made of the Eu(III)-Eu(II) redox couple in the presence of 2-thenoyltrifluoroacetone (TTA) in sodium chloride solution at pH 6.6. The Eu-TTA complex is strongly adsorbed at the surface of the mercury drop electrode and provides the possibility of measuring low concentration levels of europium. The detection limit in sodium chloride, with an accumulation time of 10 min at a potential of −0.2 V, was 5 × 10−9 mol l−1 Eu(III).

voltammetry; europium

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