Summary
A new analytical method for the quantitative determination of EDTA in radioactive waste solutions is described. With this method the total amount of EDTA is converted into the CuEDTA complex at pH 10 while an excess of cupric ions is added. The analysis is based on the Chromatographic separation of the complex from the matrix. Several stationary and mobile phases are tested for their suitability. For the identification of EDTA a UV detector operated at 260 nm is used. EDTA contents in the range of 0.5–300 mg·1−1 can be determined with relative standard deviations from 0.3 to 2.5% without preconcentration. It was found that EDTA is not stable in uranium containing solutions. In order to explain this behaviour several experiments have been carried out and the mechanism of the degradation is discussed.
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Unger, M., Mainka, E. & König, W. Quantitative determination of EDTA and its behaviour in radioactive waste solutions using HPLC. Z. Anal. Chem. 329, 50–54 (1987). https://doi.org/10.1007/BF00487541
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DOI: https://doi.org/10.1007/BF00487541