METHOD Sample preparation for the determination of uranium isotopes in oil

摘要

method of sample preparation u0434u043bu00a0 u043eu043fu0440u0435u0434u0435u043bu0435u043du0438u00a0 u0441u043eu0434u0435u0440u0436u0430u043du0438u00a0 uranium isotopes in oils by mass spectrometry with u0438u043du0434u0443u043au0442u0438u0432u043du043e u0441u0432u00a0u0437u0430u043du043du043eu0439 plasma, including sampling oil and decomposition of them concentrated acid at high temperature and pressure, u043eu0442u043bu0438u0447u0430u044eu0449u0438u0439u0441u00a0 orderdecomposition of samples leads to full transparency on u043cu043du043eu0433u043eu0441u0442u0430u0434u0438u0439u043du043eu0439 programme in microwave nitric acid of not less than 5 cm3 per sample of mas soi from 0.4 to 0.6, the maximum power of the high-frequency u0438u0437u043bu0443u0447u0435u043du0438u00a0 and pressure in u0430u0432u0442u043eu043au043bu0430u0432u0430u0445 between 500 and 1200 kpa at the time u0432u043eu0437u0434u0435u0439u0441u0442u0432u0438u00a0 sample from 5 to 15 m in each stage u0440u0430u0437u043bu043eu0436u0435u043du0438u00a0.