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, <sup>39</sup>K and <sup>41</sup>K, were used for calibration. The absolute isotopic abundance ratios are : <sup>39</sup>K/<sup>41</sup>K = 13.8566 ± 0.0063 and <sup>40</sup>K/<sup>41</sup>K = 0.0017343 ± 0.0000061 which yield atom percent compositions of <sup>39</sup>K=93.2581 ± 0.0029. <sup>40</sup>K = 0.01167 ± 0.00004, and <sup>41</sup>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.

Keywords

Isotopes of potassiumNatural abundancePotassiumChemistryIsotopeAnalytical Chemistry (journal)Mass spectrometryAbundance (ecology)Yield (engineering)CalibrationChromatographyMaterials sciencePhysics

Affiliated Institutions

Related Publications

Publication Info

Year
1975
Type
article
Volume
79A
Issue
6
Pages
713-713
Citations
131
Access
Closed

External Links

View on DOI.org

Social Impact

Altmetric
PlumX Metrics

Social media, news, blog, policy document mentions

Citation Metrics

131
OpenAlex

Cite This

E.L. Garner, T.J. Murphy, J.W. Gramlich et al. (1975). Absolute isotopic abundance ratios and the atomic weight of a reference sample of potassium. Journal of Research of the National Bureau of Standards Section A Physics and Chemistry , 79A (6) , 713-713. https://doi.org/10.6028/jres.079a.028

Identifiers

DOI
10.6028/jres.079a.028