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高分辨电感耦合等离子体质谱法测定铀矿石样品中234U/238U、230Th/232Th和228Ra/226Ra同位素比值
234U/238U 230Th/232Th 228Ra/226Ra 铀矿石 高分辨电感耦合等离子体质谱法
2014/6/16
采用氢氟酸-硝酸-盐酸混合酸密闭消解含铀矿石样品，用阴离子交换树脂、阳离子交换树脂和锶特效树脂逐级分离富集铀、钍和镭。使用高分辨电感耦合等离子体质谱(HR-ICPMS)测定分离纯化液中234U/238U、230Th/232Th和228Ra/226Ra同位素。比值的测量精密度取决于比值的大小和对应核素浓度的大小。对质量浓度为10 ng/mL 天然铀测量液，234U/238U的测量精密度优于1.2%；...
238U-230Th radioactive disequilibrium in the northern Izu arc: (230Th/232Th) in the sub-arc mantle
U-series disequilibria Izu arc subduction isotope geochemistry trace element geochemistry sediment
2017/8/10
Major and trace element abundances, Sr and Nd isotopic ratios, and 238U-230Th radioactive disequilibria have been analyzed for samples from five volcanoes, Oshima, Miyakejima, Niijima, Teishi Knoll an...