ISO 11665-1:2012 Measurement of radioactivity in the environment - Air: radon-222 - Part 1: Origins of radon and its short-lived decay products and associated measurement methods
ISO 11929:2010 Determination of the characteristic limits (decision threshold, detection limit and limits of the confidence interval) for measurements of ionizing radiation - Fundamentals and application
ISO 19361 Measurement of radioactivity — Determination of beta emitters activities — Test method using liquid scintillation counting*, 2017-08-10 Update