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首页> 外文期刊>The journal of earth and planetary sciences, Nagoya University >Estimation of optimal isotopic compositions of Sr, Ba, Nd and Sm spikes for double spike thermal ionization mass spectrometry by error propagation simulation
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Estimation of optimal isotopic compositions of Sr, Ba, Nd and Sm spikes for double spike thermal ionization mass spectrometry by error propagation simulation

机译：通过误差传播模拟估算双峰热电离质谱法中Sr，Ba，Nd和Sm峰的最佳同位素组成

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Double spike thermal ionization mass spectrometry is a technique that can measure precisely the variation in stable isotopic composition of large atomic number elements. Precision of the double spike technique depends on the isotopic composition of the combined-spikes and also on analytical parameters such as sample-spike mixing factor and combination of the three isotope ratios used in the double spike analysis. Prior to preperation of the double spike, error propagation simulation through the double spike data analyses of Sr, Ba, Nd and Sm is carried out in order to estimate both optimal isotopic composition of the combined-spikes and optimal analytical conditions for these elements. The best isotopic compositions of combined spikes are ~(84)Sr/~(86)Sr_(double spike) ～ 2.5, ~(134)Ba/~(136)Ba_(double-spike) ～ 2.5, ~(150)Nd/~(145)Nd_(double spike) ～ 1.0 and ~(150)Sm/~(154)Sm_(double spike) ～ 0.47 for Sr, Ba, Nd and Sm, respectively. Optimal analytical conditions are also determined. Reliability of the simulation is confirmed by comparing the Sr error magnification factor of an actual double-spike analysis with the simulation results.
机译：双峰热电离质谱法是一种可以精确测量大原子序数元素的稳定同位素组成变化的技术。双尖峰技术的精度取决于组合尖峰的同位素组成，还取决于分析参数，例如样品尖峰混合因子以及双尖峰分析中使用的三种同位素比率的组合。在准备双尖峰之前，通过对Sr，Ba，Nd和Sm的双尖峰数据进行了误差传播模拟，以估算组合尖峰的最佳同位素组成和这些元素的最佳分析条件。组合尖峰的最佳同位素组成为〜（84）Sr /〜（86）Sr_（双尖峰）〜2.5，〜（134）Ba /〜（136）Ba_（双尖峰）〜2.5，〜（150）Nd Sr，Ba，Nd和Sm分别为/〜（145）Nd_（双峰）〜1.0和〜（150）Sm /〜（154）Sm_（双峰）〜0.47。还确定了最佳分析条件。通过将实际的双尖峰分析的Sr误差放大系数与仿真结果进行比较，可以确认仿真的可靠性。

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    Shigeyuki Wakaki;

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    Department of Natural History Sciences, Hokkaido University, Sapporo 060-0810, Japan Department of Earth and Environmental Sciences, Nagoya University,Chikusa, Nagoya 464-8601, Japan Kochi Institute for Core Sample Research, Japan Agency of Marine-Earth Science and Technology (JAMSTEC), 200 Monobe Otsu, Nankoku 783-8502, Japan;

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