Plutonium in human urine: Normal levels in the US public. 1991 Annual report, Volume 2

摘要

A neutron induced fission track method was successfully developed for assaying (sup 239)Pu in human urine with a detection limit below 20 aCi/sample. The technique involves the co-precipitation of (sup 239)Pu with rhodizonic acid, separation of (sup 239)Pu from potentially interfering natural uranium and other inorganic materials by ion-exchange techniques, collection of the sample onto lexan detectors, irradiation of sample in MIT reactor at a fluence of 1.1 x 10(sup 17) n/cm(sup 2), etching of the lexan slide and counting the track either manually or by some automated counting system.