A Rapid Method for the Determination of 137Cs in Seawater


A method is developed to measure 137Cs in seawater. It entails the use of silica gel impregnated with hexacyanoferrates as an ion-exchanger to concentrate 137Cs from large volumes of seawater, followed by gamma-ray spectrometry with a high efficiency HPGe detector. Both laboratory experiments and field operation resulted in satisfactory recovery of 137Cs. Compared with the traditional pre-concentration method using AMP as the scavenger, this method is more rapid, more cost-effective, and can be more easily performed aboard ships.

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