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Coordinate swapping in standard addition graphs for analytical chemistry: a simplified path for uncertainty calculation in linear and nonlinear plots

Par Conseil national de recherches du Canada

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DOITrouver le DOI : https://doi.org/10.1021/ac5014749
AuteurRechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-3349-5535; Rechercher : 1; Rechercher : 1Identifiant ORCID : https://orcid.org/0000-0002-2377-2615
Affiliation
  1. Conseil national de recherches du Canada. Science des mesures et étalons
FormatTexte, Article
Sujetchemical analysis; calibration lines; nonlinear curves; quadratic modeling; standard addition; uncertainty calculations; uncertainty evaluation; chemistry
Résumé
Uncertainty of the result from the method of standard addition is often underestimated due to neglect of the covariance between the intercept and the slope. In order to simplify the data analysis from standard addition experiments, we propose x-y coordinate swapping in conventional linear regression. Unlike the ratio of the intercept and slope, which is the result of the traditional method of standard addition, the result of the inverse standard addition is obtained directly from the intercept of the swapped calibration line. Consequently, the uncertainty evaluation becomes markedly simpler. The method is also applicable to nonlinear curves, such as the quadratic model, without incurring any additional complexity.
Date de publication
Maison d’éditionAmerican Chemical Society
Dans
  • Analytical Chemistry 86, nº 17 (2 septembre 2014) : 8563–8567.
Langueanglais
Publications évaluées par des pairsOui
Numéro NPARC21272638
Exporter la noticeExporter en format RIS
Signaler une correctionSignaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement8464f428-2dd1-4c13-a23d-7f3ff3edb63d
Enregistrement créé2014-12-03
Enregistrement modifié2024-09-19
Date de modification :