Rapid procedure for actinides and Sr analysis in emergency urine spot samples applied in the GHSI-RNWG emergency intercomparison exercise.

A rapid radiochemical separation method for quantification of 90Sr, plutonium, americium, curium, uranium and thorium isotopes in urine spot samples has been developed. The validation and suitability of the method has been tested in the emergency intercomparison exercise organised by the Global Health Security Initiative/Radio-Nuclear Threats Working Group. Excellent results were obtained with bias of −0.07 (239Pu) and −0.11 (90Sr). CIEMAT Laboratory also fulfilled the established reporting schedule and submitted the results within 72 hours, as required.