Molecular ion beam method of isotopic analysis: Effect of error propagation, a case study with Li2BO2+
Molecular ion beam method of isotopic analysis: Effect of error propagation, a case study with Li2BO2+
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同位素分析的分子离子束法：误差传播的影响，以 Li2BO2 为例
DOI：
10.1002/rcm.1290070704
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发表时间：
1993
影响因子：
2
通讯作者：
H. C. Jain
中科院分区：
文献类型：
--
作者：
B. Datta;P. Khodade;A. Parab;A. Goyal;S. A. Chitambar;H. C. Jain
使用不同的同位素 Li2BO 离子对作为监测器进行了硼的同位素分析。不同分子丰度比的质谱测量精度大致相同。然而，根据不同同位素分子离子对的实验比值计算出的10B/11B丰度比值显示出较大的变化。这些变化被证明是计算步骤的逻辑结果，导致不同峰值比率的测量误差不同程度地放大。类似的论点也适用于采用分子离子束技术的任何元素的同位素分析。还讨论了同位素分馏对分子丰度的影响。本研究的重要意义在于，它为选择合适的监测分子以避免此类错误制定了指导方针。
The isotopic analysis of boron has been carried out using different pairs of isotopic Li2BO ions as monitors. The precision of the mass spectromctric measurements of different molecular abundance ratios is roughly the same. However, the values of the 10B/11B abundance ratio calculated from the experimental ratios of different pairs of isotopic molecular ions show large variations. These variations are shown to be a logical consequence of the calculation step which leads to the magnification of measurement errors to different extents for different peak ratios. Similar arguments would apply for the isotopic analysis of any element employing the molecular ion beam technique. The effect of isotopic fractionation on the molecular abundances is also discussed. The important implication of the present investigation is that it sets the guidelines for selecting suitable monitor molecules to avoid such errors.