A cold ultrasound digestion method to dissolve solid samples for radio-chemical analysis of ~(210)Po has been developed. The method can shorten the time needed to dissolve solid samples in acids and reduce secondary wastes and acid fume emissions. The main factors affecting sample dissolution such as ultrasound exposure time, acid concentration and acid type have been studied; low concentrations (1 mol 1~(-1)) and volumes of hydrochloric acid being required for leaching of ~(210)Po from soil samples. In addition, gross alpha and beta measurements to compare the performance of the ultrasound system to the traditional procedure for analysis of other radionuclides have been examined. The obtained results have shown that an ultrasound cleaning bath can offer good improvements in the sample preparation process for radio-chemical analysis of solid samples.
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