The method about determination isotope ratio in 1ng Uranium and 100pg Plutonium samples has been developed by using IDMS with high isotope abundance spike 233U and 242Pu. The isotope ratio uncertainty in 1ng Uranium a...The method about determination isotope ratio in 1ng Uranium and 100pg Plutonium samples has been developed by using IDMS with high isotope abundance spike 233U and 242Pu. The isotope ratio uncertainty in 1ng Uranium and 100pg Plutonium samples are about (20%, and it was mainly contributed by isotope ratio uncertainty of blend and spike. The blend and spike contamination from natural Uranium must be care in experiments.展开更多
A determination method for isotope ratios of iron in faeces samples is studied in this paper. The sample is decomposed in microwave oven by HNO3. A double focusing ICP-MS mass spectrometer (ELEMENT) working at resolut...A determination method for isotope ratios of iron in faeces samples is studied in this paper. The sample is decomposed in microwave oven by HNO3. A double focusing ICP-MS mass spectrometer (ELEMENT) working at resolution of 3000 allows the complete resolution of polyatomic ions overlapping. Instrumental parameters of the mass spectrometer are optimized for optimum precision. The RSD values obtained for the isotope ratios of 54Fe/56Fe, 57Fe/56Fe and 58Fe/56Fe are 0.23, 0.14, 0.22%, respectively, for a natural standard solution of 5ug/ml. The method has been used to iron nutrition studies.展开更多
文摘The method about determination isotope ratio in 1ng Uranium and 100pg Plutonium samples has been developed by using IDMS with high isotope abundance spike 233U and 242Pu. The isotope ratio uncertainty in 1ng Uranium and 100pg Plutonium samples are about (20%, and it was mainly contributed by isotope ratio uncertainty of blend and spike. The blend and spike contamination from natural Uranium must be care in experiments.
文摘A determination method for isotope ratios of iron in faeces samples is studied in this paper. The sample is decomposed in microwave oven by HNO3. A double focusing ICP-MS mass spectrometer (ELEMENT) working at resolution of 3000 allows the complete resolution of polyatomic ions overlapping. Instrumental parameters of the mass spectrometer are optimized for optimum precision. The RSD values obtained for the isotope ratios of 54Fe/56Fe, 57Fe/56Fe and 58Fe/56Fe are 0.23, 0.14, 0.22%, respectively, for a natural standard solution of 5ug/ml. The method has been used to iron nutrition studies.
