Nguyễn Thị Kim Dung, Nguyễn Thị Liên, Nguyễn Thị Mến, Đỗ Văn Thuấn
Trung tâm phân tích – Viện Công nghệ Xạ hiếm
Abstract: Ion Chromatography (ICS 2100 Dionex) is used to determine the anions such as F–, Cl–, Br–, NO2–, NO3–, SO42-, PO43- in solution samples. It is one of advanced techniques that allows rapid analysis in general and in particular fluoride anions with high sensitivity. Fluoride in UO2 powder samples was directly separated from solid samples containing uranium by using pyrohydrolysis technique. The recovery of pyrohydrolysis reaction was studied on new apparatus made in Germany under the design and order by CB11/03-01 project. Optimization of the pyrohydrolysis apparatus and ion chromatography (IC) was achieved and the procedure for quantitative determination of flouride in solid samples was thus established for the application.
Keywords: pyrohydrolysis, ion chromatography (IC), UO2 samples