Simultaneous Determination of Hydrogen Peroxide, Hydroxylamine and Iodate in Basic Media by Differential Pulse Polarography

• Published in: Journal of nuclear science and technology Vol. 42; no. 1; pp. 82 - 89
• Main Authors: COMBEAU, Sandrine, LEGEAI, Sophie, CHATELUT, Michelle, VITTORI, Olivier, DEVISME, Frédéric
• Format: Journal Article
• Language: English
• Published: Tokyo Taylor & Francis Group 01.01.2005; Atomic Energy Society of Japan
• Subjects: Applied sciences; differential pulse polarography; Energy; Energy. Thermal use of fuels; Exact sciences and technology; Fission nuclear power plants; Fuels; high pH; hydrogen peroxide; hydroxylamine; Installations for energy generation and conversion: thermal and electrical energy; iodate; iodine management; Nuclear fuels; nuclear wastes analysis; Preparation and processing of nuclear fuels; Iodates; Fuel management; Hydrogen peroxide; Stability; iodate; hydroxylamine; high pH; Media; iodine management; Nuclear fuel; differential pulse polarography; Reprocessing; pH; Liquid hydrogen; nuclear wastes analysis; Irradiated nuclear fuel; Iodine
• ISSN: 0022-3131; 1881-1248
• DOI: 10.1080/18811248.2005.9726367

The study of a new process for iodine management during nuclear spent fuel reprocessing has shown the necessity to develop a reproducible, accurate and rapid determination of iodate, hydroxylamine and hydrogen peroxide in the liquid wastes. If possible, the analysis should be performed at high pH for species stability reasons. Differential pulse polarography using LiOH 0.1 mol-l −1 as supporting electrolyte appeared to be a sensitive technique for the simultaneous analysis of the three compounds. The species electrochemical behaviours were studied independently and the chemical interactions were determined. Because of numerous interactions occurring between the species, analyses by the standard addition technique was excluded and rigorous operating conditions must be applied. Simultaneous analysis was performed by adding small amounts of sample in 10 ml LiOH 0.1 mol-l −1 deaerated supporting electrolyte and using calibrations curves. The three species could be determined in one cathodic scan with satisfying sensitivity (limit of detection=1×10 −6 mol-l −1 ), reproducibility (relative standard deviation<8% for ten measurements) and selectivity.