ローダミンBと2-テノイルトリフルオロアセトンを用いたウランの抽出/蛍光定量

概要

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A method for the fluorometric determination of uranium, based on a solvent extraction of an ion associate formed between Rhodamine B cation and 2-thenoyltrifluoroacetone (TTA)-metal chelate anion with benzene, is described. The procedure for the construction of the calibration curve is as follows. Varying amounts of uranium standard solution and 2ml of 2M ammonium acelate buffer solution are mixed. The solution is adjusted at pH 6.0and 10ml of 0.3% Rhodamine B are added. It is then shaken for 5 min with 10ml of 0.01 M TTA benzene solution. The fluoresence of the organic phase is measured at 545 nm (excitation) and 570nm (emission) for uranyl-TTA-Rhodamine B complex. The fluorescence intensity is linearly related to the concentration of uranyl ion in the range of 0.05 ppm to 1 ppm.
1990-03-05