UNE-EN ISO 12183:2019

This document describes an analytical method for the electrochemical assay of pure plutonium nitratesolutions of nuclear grade, with a total uncertainty not exceeding ±0,2 % at the confidence level of0,95 for a single determination (coverage factor, K = 2). The method is suitable for aqueous solutionscontaining more than 0,5 g/L plutonium and test samples containing between 4 mg and 15 mg ofplutonium. Application of this technique to solutions containing less than 0,5 g/L and test samplescontaining less than 4 mg of plutonium requires experimental demonstration by the user that applicabledata quality objectives will be met.For some applications, purification of test samples by anion exchange is required before measurement toremove interfering substances when present in significant amounts. Refer to Clause 10 for a discussionof interferences and corrective actions. Purification is also appropriate in situations where the purityof the test sample is unknown or when it may fluctuate unpredictably in a manufacturing process.Clause 11 discusses the changes in application of the method and methodology that can be applied andimportant considerations when selecting measurement parameters, while still remaining within theintended scope of this document.