锶参考样品的绝对同位素丰度比和原子量。
Absolute Isotopic Abundance Ratios and Atomic Weight of a Reference Sample of Strontium.
作者信息
Moore L J, Murphy T J, Barnes I L, Paulsen P J
机构信息
National Bureau of Standards, Washington, DC 20234.
出版信息
J Res Natl Bur Stand (1977). 1982 Jan-Feb;87(1):1-8. doi: 10.6028/jres.087.001.
Abstract
Absolute values have been obtained for the isotopic abundance ratios of a reference sample of strontium using solid sample thermal ionization mass speelrometry. Samples of independently known isotopic composition prepared from chemically pure and nearly isotopically pure separated strontium isotopes were used to calibrate the mass speelrometry. The resulting absolute Sr/Sr, Sr/Sr, and Sr/Sr ratios are 8.3786 ± 0.0033, 0.71034 ± 0.00026, and 0.05655 ± 0.00014 respectively which yields atom percents of: Sr = 82.5845 ± 0.0066, Sr = 7.0015 ± 0.0026, Sr = 9.8566 ± 0.0034. and Sr = 0.5574 ± 0.0015. The atomie weight calculated from these abundances is 87.61681 ± 0.00012. The indicated uncertainties are overall limits of error based on 95 percent confidence limits for the mean and allowances for the effects of possible systematic error.
摘要
使用固体样品热电离质谱法获得了锶参考样品的同位素丰度比的绝对值。由化学纯且几乎同位素纯的分离锶同位素制备的具有独立已知同位素组成的样品用于校准质谱仪。所得的绝对 Sr/Sr、Sr/Sr 和 Sr/Sr 比值分别为 8.3786 ± 0.0033、0.71034 ± 0.00026 和 0.05655 ± 0.0001,这产生的原子百分比为：Sr = 82.5845 ± 0.0066、Sr = 7.0015 ± 0.0026、Sr = 9.8566 ± 0.0034 和 Sr = 0.5574 ± 0.0015。根据这些丰度计算出的原子量为 87.61681 ± 0.00012。所示的不确定度是基于平均值的 95% 置信限以及可能的系统误差影响的余量得出的总体误差极限。
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