Título
Statistically coherent calibration of X-ray fluorescence spectrometry for major elements in rocks and minerals
Autor
SURENDRA PAL VERMA JAISWAL
SANJEET KUMAR VERMA
MARIA ABDELALY RIVERA GOMEZ
DARIO TORRES SANCHEZ
LORENA DIAZ GONZALEZ
ALEJANDRA AMEZCUA VALDEZ
BEATRIZ ADRIANA RIVERA ESCOTO
MAURICIO ROSALES RIVERA
ARMSTRONG ALTRIN SAM JOHN SELVAMONY
Héctor López Loera
FERNANDO VELASCO TAPIA
PANDARINATH KAILASA
Nivel de Acceso
Acceso Abierto
Identificador alterno
doi: https://doi.org/10.1155/2018/5837214
Materias
Weighted least-squares - (AUTOR) Geochemical reference samples - (AUTOR) Neutron-activation analysis - (AUTOR) Fitting straight-lines - (AUTOR) Trace-elements - (AUTOR) 1987 compilation - (AUTOR) Replicated observations - (AUTOR) Quality-control - (AUTOR) Regression - (AUTOR) XRF - (AUTOR) BIOLOGÍA Y QUÍMICA - (CTI) CIENCIAS DE LA VIDA - (CTI) BIOQUÍMICA - (CTI) BIOQUÍMICA - (CTI)
Resumen o descripción
"We applied both the ordinary linear regression (OLR) and the new uncertainty weighted linear regression (UWLR) models for the calibration and comparison of a XRF machine through 59 geochemical reference materials (GRMs) and a procedure blank sample. The mean concentration and uncertainty data for the GRMs used for the calibrations (Supplementary Materials) (available here) filewere achieved from an up-to-date compilation of chemical data and their processing from well-known discordancy and significance tests. The drift-corrected XRF intensity and its uncertainty were determined from mostly duplicate pressed powder pellets. The comparison of the OLR (linear correlation coefficient ?0.9523–0.9964 and 0.9771–0.9999, respectively, for before and after matrix correction) and UWLR models (?0.9772–0.9976 and 0.9970–0.9999, respectively) clearly showed that the latter with generally higher values of is preferable for routine calibrations of analytical procedures. Both calibrations were successfully applied to rock matrices, and the results were generally consistent with those obtained in other laboratories although the UWLR model showed mostly narrower confidence limits of the mean (slope and intercept) or lower uncertainties than the OLR. Similar sensitivity (?2.69–46.17?kc·s?1·%?1 for the OLR and ?2.78–59.69?kc·s?1·%?1 for the UWLR) also indicated that the UWLR could advantageously replace the OLR model. Another novel aspect is that the total uncertainty can be reported for individual chemical data. If the analytical instruments were routinely calibrated from the UWLR model, this action would make the science of geochemistry more quantitative than at present."
Editor
Hindawi Publishing Corporation
Fecha de publicación
2018
Tipo de publicación
Artículo
Versión de la publicación
Versión publicada
Recurso de información
Formato
application/pdf
Sugerencia de citación
Surendra P. Verma, Sanjeet K. Verma, M. Abdelaly Rivera-Gómez, et al., “Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals,” Journal of Spectroscopy, vol. 2018, Article ID 5837214, 13 pages, 2018. https://doi.org/10.1155/2018/5837214.
Repositorio Orígen
Repositorio IPICYT
Descargas
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