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Interpretation and use of standard atomic weights (IUPAC Technical Report)

Par Conseil national de recherches du Canada

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DOITrouver le DOI : https://doi.org/10.1515/pac-2017-1002
AuteurRechercher : Identifiant ORCID : https://orcid.org/0000-0002-9648-5123; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-3349-5535; Rechercher : ; Rechercher : Identifiant ORCID : https://orcid.org/0000-0001-9210-2941
Affiliation
  1. Conseil national de recherches Canada. Centre de recherche en métrologie
FormatTexte, Article
Sujetatomic weights; atomic-weight intervals; molecular weight; relative atomic mass; relative molecular mass; standard atomic weight; uncertainty; uncertainty propagation
Résumé
Many calculations for science or trade require the evaluation and propagation of measurement uncertainty. Although relative atomic masses (standard atomic weights) of elements in normal terrestrial materials and chemicals are widely used in science, the uncertainties associated with these values are not well understood. In this technical report, guidelines for the use of standard atomic weights are given. This use involves the derivation of a value and a standard uncertainty from a standard atomic weight, which is explained in accordance with the requirements of the Guide to the Expression of Uncertainty in Measurement. Both the use of standard atomic weights with the law of propagation of uncertainty and the Monte Carlo method are described. Furthermore, methods are provided for calculating uncertainties of relative molecular masses of substances and their mixtures. Methods are also outlined to compute material-specific atomic weights whose associated uncertainty may be smaller than the uncertainty associated with the standard atomic weights.
Date de publication
Maison d’éditionInternational Union of Pure and Applied Chemistry
De Gruyter
Licence
Dans
  • Pure and Applied Chemistry 93, nº 5 (26 mai 2021) : 629–646.
Langueanglais
Publications évaluées par des pairsOui
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Identificateur de l’enregistrement2d5fea2f-60da-449b-aa63-1db43d77e129
Enregistrement créé2022-10-24
Enregistrement modifié2022-10-24
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