钾参考样品的绝对同位素丰度比与原子量
Absolute Isotopic Abundance Ratios and the Atomic Weight of a Reference Sample of Potassium.
作者信息
Garner E L, Murphy T J, Gramlich J W, Paulsen P J, Barnes I L
机构信息
Institute for Materials Research, National Bureau of Standards, Washington, D.C. 20234.
出版信息
J Res Natl Bur Stand A Phys Chem. 1975 Nov-Dec;79A(6):713-725. doi: 10.6028/jres.079A.028.
Abstract
Solid sample, thermal ionization, mass spectrometry has been used to obtain absolute values for the isotopic abundance ratios of a reference sample of potassium. Standards of known isotopic composition, prepared by gravimetrically mixing nearly isotopically and chemically pure separated isotopes of, K and K, were used for calibration. The absolute isotopic abundance ratios are : K/K = 13.8566 ± 0.0063 and K/K = 0.0017343 ± 0.0000061 which yield atom percent compositions of K=93.2581 ± 0.0029. K = 0.01167 ± 0.00004, and K = 6.7302 ± 0.0029. The calculated atomic weight for potassium is 39.098304 ± 0.000058. The indicated uncertainties are overall limits of error which are the sum of the uncertainty components for ratio determinations and the components covering the effects of known sources of possible systematic error.
摘要
固体样品热电离质谱法已用于获取钾参考样品同位素丰度比的绝对值。通过重量法混合几乎同位素和化学纯的分离的K和K同位素制备的已知同位素组成标准物用于校准。绝对同位素丰度比为：K/K = 13.8566 ± 0.0063和K/K = 0.0017343 ± 0.0000061，其产生的原子百分比组成为K = 93.2581 ± 0.0029，K = 0.01167 ± 0.00004，以及K = 6.7302 ± 0.0029。计算出的钾的原子量为39.098304 ± 0.000058。所示的不确定度是总误差极限，它是比值测定不确定度分量与涵盖已知可能系统误差源影响的分量之和。
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本文引用的文献
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J Res Natl Bur Stand A Phys Chem. 1973 Nov-Dec;77A(6):691-698. doi: 10.6028/jres.077A.040.
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Absolute Isotopic Abundance Ratio and the Atomic Weight of Bromine.绝对同位素丰度比与溴的原子量
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Absolute Isotopic Abundance Ratio and the Atomic Weight of a Reference Sample of Copper.铜参考样品的绝对同位素丰度比与原子量
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