ISO/DIS 18990

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ISO/DIS 18990 refers to a Draft International Standard (DIS) published by the International Organization for Standardization (ISO). Specifically, it concerns the measurement of radioactivity in urine, with a focus on plutonium isotopes 238Pu, 239Pu, and 240Pu. The standard outlines a test method using alpha spectrometry and ICP-MS (Inductively Coupled Plasma Mass Spectrometry)