Abstract
The high-performance size-exclusion chromatography (HPSEC) and radiochromatography (HPSERC) was used for the identification of radiocesium and radiostrontium interaction with humic acid. It was found that the behavior of humic acid on size-exclusion chromatography is sensitive to the salt concentration and pH of the mobile phase. At lower ionic strength and in acidic region of pH, the Aldrich humic acid exhibited three main fraction within the ranges >760 kDa, 25–100 kDa and <5 kDa. Radiocesium was found in the low-molecular fractions (<1 kDa) of humic acids but radiostrontium interacts preferably with the fractions of humic acid of molecular weight within the range 2–5 kDa.
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Rajec, P., Gerhart, P., Macášek, F. et al. Size exclusion (radio) chromatography of aqueous humic acid solutions with cesium and strontium. J Radioanal Nucl Chem 241, 37–43 (1999). https://doi.org/10.1007/BF02347287
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DOI: https://doi.org/10.1007/BF02347287