Semi-automatic version of the potentiometric titration method for characterization of uranium compounds

• Published in: Applied radiation and isotopes Vol. 70; no. 9; pp. 1952 - 1954
• Main Authors: Cristiano, Bárbara F.G., Delgado, José Ubiratan, da Silva, José Wanderley S., de Barros, Pedro D., de Araújo, Radier M.S., Dias, Fábio C., Lopes, Ricardo T.
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.09.2012
• Subjects: Algorithms; Brazil; Half-Life; Intercomparison program; Internationality; Potentiometric titration; Potentiometry - methods; Potentiometry - standards; Radiation Dosage; Radiometry - methods; Radiometry - standards; Reference material; Reference Standards; Reference Values; Robotics - methods; Robotics - standards; Uranium - analysis; Uranium - chemistry; Uranium compounds; Brazil; Reference material; Uranium compounds; Intercomparison program; Potentiometric titration
• ISSN: 0969-8043; 1872-9800
• DOI: 10.1016/j.apradiso.2012.02.051

The potentiometric titration method was used for characterization of uranium compounds to be applied in intercomparison programs. The method is applied with traceability assured using a potassium dichromate primary standard. A semi-automatic version was developed to reduce the analysis time and the operator variation. The standard uncertainty in determining the total concentration of uranium was around 0.01%, which is suitable for uranium characterization and compatible with those obtained by manual techniques. ► A semi-automatic potentiometric titration method was developed for U charaterization. ► K2Cr2O7 was the only certified reference material used. ► Values obtained for U3O8 samples were consistent with certified. ► Uncertainty of 0.01% was useful for characterization and intercomparison program.