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Accurate, low-level measurement of 226 Ra in high volume water samples requires rapid pre-concentration and robust separation techniques prior to measurement in order to comply with discharge limits and drinking water regulations. This study characterises the behaviour of 226 Ra and interfering elements on recently developed TK100 (Triskem International) extraction chromatography resin. Distribution coefficients over a range of acid concentrations are given, along with an optimised procedure that shows rapid pre-concentration and separation of 226 Ra on TK100 resin is achievable for high volume (1 L) water samples without the need for sample pre-treatment.

The behaviour of 226Ra in high-volume environmental water samples on TK100 resin