镍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 Nickel.
作者信息
Gramlich J W, Machlan L A, Barnes I L, Paulsen P J
机构信息
National Institute of Standards and Technology, Gaithersburg, MD 20899.
出版信息
J Res Natl Inst Stand Technol. 1989 Nov-Dec;94(6):347-356. doi: 10.6028/jres.094.034.
Absolute values have been obtained for the isotopic abundance ratios of a reference sample of nickel (Standard Reference Material 986), using thermal ionization mass spectrometry. Samples of known isotopic composition, prepared from nearly isotopically pure separated nickel isotopes, were used to calibrate the mass spectrometers. The resulting absolute isotopic ratios are: Ni/Ni=2.596061±0.000728, Ni/Ni=0.043469±0.000015,Ni/Ni=0.138600±0.000045, and Ni/Ni=0.035295±0.000024, which yield atom percents of Ni=68.076886 ±0.005919, Ni = 26.223146±0.005144,Ni=1.139894±0.000433, Ni =3.634528±0.001142, and Ni =0.925546±0.000599. The atomic weight calculated from this isotopic composition is 58.693353 ±0.000147. The indicated uncertainties are overall limits of error based on two standard deviations of the mean and allowances for the effects of known sources of possible systematic error.
采用热电离质谱法测定了镍参考样品（标准参考物质986）的同位素丰度比绝对值。使用由几乎同位素纯的分离镍同位素制备的已知同位素组成的样品对质谱仪进行校准。得到的绝对同位素比为：Ni/Ni = 2.596061±0.000728，Ni/Ni = 0.043469±0.000015，Ni/Ni = 0.138600±0.000045，以及Ni/Ni = 0.035295±0.000024，由此得出的Ni原子百分数为68.076886±0.005919，Ni = 26.223146±0.005144，Ni = 1.139894±0.000433，Ni = 3.634528±0.001142，Ni = 0.925546±0.000599。根据该同位素组成计算出的原子量为58.693353±0.000147。所示的不确定度是基于平均值的两个标准偏差以及已知可能系统误差源影响的余量得出的总误差极限。
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