Measuring process of at least one element chosen from Pu(IV), Pu(VI), uranium and nitrates present in a solution by liquid chromatography

摘要

Process for measuring the concentration of at least one element, selected from Plutonium (IV), Plutonium (VI), uranium and nitrates, present in a solution, by liquid chromatography, comprises: (a) injection of a sample of the solution onto a stationary phase comprising an aprotic support; (b) elution of the sample by a liquid mobile phase which comprises an ammonium type counter ion, a sulphate ion, an acid of at least 0.001 N, a mixture of solvents comprising a 1-4C alcohol, a polar organic solvent modifier different from the alcohol and miscible with water, and water to obtain an eluant; (c) analysis of the eluant to determine the elements in the sample; and (d) measuring these elements.