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New EDTA determination method based on ion chromatography with suppressed conductimetric detection

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Abstract

A novel direct method for the determination of EDTA in alkaline radioactive evaporator residue solution was developed and validated based on ion chromatography with suppressed conductimetric detection and anion exchange columns (A Supp 4, 4 mm × 250 mm and A Supp 5, 4 mm × 150 mm). The yttrium-EDTA complex resulted one single chromatographic peak in the eluent and allowed the correct determination of EDTA in an alkaline, high concentration radioactive waste water. Depending on coexisting substances, suitable eluent is 10.0 mM carbonate buffer/pH 10.6 or 10.75 (t R,Y–EDTA = 7.01 and 6.4 min, respectively). For 10.0 mM carbonate buffer/pH 10.6 and isocratic flow rate of 1.0 cm3/min, a linear calibration curve was obtained from 5 to 40 mg/dm3 (r > 0.999) EDTA. Good resolution was achieved from commonly coexisting anions (chloride, nitrite, nitrate, sulphate, phosphate, bromide and citrate). The developed simple ion chromatographic method was applied for the assay of EDTA in various radioactive alkaline solutions.

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Correspondence to Yahya Ramadan.

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Pátzay, G., Ramadan, Y. & Tonkó, C. New EDTA determination method based on ion chromatography with suppressed conductimetric detection. J Radioanal Nucl Chem 302, 161–168 (2014). https://doi.org/10.1007/s10967-014-3238-3

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  • DOI: https://doi.org/10.1007/s10967-014-3238-3

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