Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals
Weappliedboththeordinarylinearregression(OLR)andthenewuncertaintyweightedlinearregression(UWLR)modelsfor thecalibrationandcomparisonofaXRFmachinethrough59geochemicalreferencematerials(GRMs)andaprocedureblank sample. The mean concentration and uncertainty data for the GRMs used for the calibrations (...
| Autores principales: | , , , , , , , , , , , |
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| Formato: | Artículo |
| Lenguaje: | inglés |
| Publicado: |
Rafal Sitko
2018
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| Materias: | |
| Acceso en línea: | http://eprints.uanl.mx/17160/1/268.pdf |
| _version_ | 1824414810798817280 |
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| author | Verma, Surendra P. Verma, Sanjeet K. Rivera Gómez, María Abdelaly Torres Sánchez, Darío Díaz González, Lorena Amezcua Valdez, Alejandra Rivera Escoto, Beatriz Adriana Rosales Rivera, Mauricio Armstrong Altrin, John S. López Loera, Héctor Velasco Tapia, Fernando Pandarinath, Kailasa |
| author_facet | Verma, Surendra P. Verma, Sanjeet K. Rivera Gómez, María Abdelaly Torres Sánchez, Darío Díaz González, Lorena Amezcua Valdez, Alejandra Rivera Escoto, Beatriz Adriana Rosales Rivera, Mauricio Armstrong Altrin, John S. López Loera, Héctor Velasco Tapia, Fernando Pandarinath, Kailasa |
| author_sort | Verma, Surendra P. |
| collection | Repositorio Institucional |
| description | Weappliedboththeordinarylinearregression(OLR)andthenewuncertaintyweightedlinearregression(UWLR)modelsfor thecalibrationandcomparisonofaXRFmachinethrough59geochemicalreferencematerials(GRMs)andaprocedureblank 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 r∼0.9523–0.9964 and 0.9771– 0.9999, respectively, for before and after matrix correction) and UWLR models (r∼0.9772–0.9976 and 0.9970–0.9999, respectively) clearly showed that the latter with generally higher values of r 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)orloweruncertaintiesthantheOLR.Similarsensitivity(∼2.69–46.17kc·s1·%1 fortheOLRand∼2.78–59.69kc·s1·%1 for the UWLR) also indicated that the UWLR could advantageously replace the OLR model. Another novel aspect is that the totaluncertaintycanbereportedforindividualchemicaldata.Iftheanalyticalinstrumentswereroutinelycalibratedfromthe UWLR model, this action would make the science of geochemistry more quantitative than at present. |
| format | Article |
| id | eprints-17160 |
| institution | UANL |
| language | English |
| publishDate | 2018 |
| publisher | Rafal Sitko |
| record_format | eprints |
| spelling | eprints-171602023-05-18T18:58:05Z http://eprints.uanl.mx/17160/ Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals Verma, Surendra P. Verma, Sanjeet K. Rivera Gómez, María Abdelaly Torres Sánchez, Darío Díaz González, Lorena Amezcua Valdez, Alejandra Rivera Escoto, Beatriz Adriana Rosales Rivera, Mauricio Armstrong Altrin, John S. López Loera, Héctor Velasco Tapia, Fernando Pandarinath, Kailasa QD Química Weappliedboththeordinarylinearregression(OLR)andthenewuncertaintyweightedlinearregression(UWLR)modelsfor thecalibrationandcomparisonofaXRFmachinethrough59geochemicalreferencematerials(GRMs)andaprocedureblank 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 r∼0.9523–0.9964 and 0.9771– 0.9999, respectively, for before and after matrix correction) and UWLR models (r∼0.9772–0.9976 and 0.9970–0.9999, respectively) clearly showed that the latter with generally higher values of r 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)orloweruncertaintiesthantheOLR.Similarsensitivity(∼2.69–46.17kc·s1·%1 fortheOLRand∼2.78–59.69kc·s1·%1 for the UWLR) also indicated that the UWLR could advantageously replace the OLR model. Another novel aspect is that the totaluncertaintycanbereportedforindividualchemicaldata.Iftheanalyticalinstrumentswereroutinelycalibratedfromthe UWLR model, this action would make the science of geochemistry more quantitative than at present. Rafal Sitko 2018-12-11 Article PeerReviewed text en cc_by_nc_nd http://eprints.uanl.mx/17160/1/268.pdf http://eprints.uanl.mx/17160/1.haspreviewThumbnailVersion/268.pdf Verma, Surendra P. y Verma, Sanjeet K. y Rivera Gómez, María Abdelaly y Torres Sánchez, Darío y Díaz González, Lorena y Amezcua Valdez, Alejandra y Rivera Escoto, Beatriz Adriana y Rosales Rivera, Mauricio y Armstrong Altrin, John S. y López Loera, Héctor y Velasco Tapia, Fernando y Pandarinath, Kailasa (2018) Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals. Journal of spectroscopy, 2018. pp. 1-13. ISSN 2314-4939 http://doi.org/10.1155/2018/5837214 doi:10.1155/2018/5837214 |
| spellingShingle | QD Química Verma, Surendra P. Verma, Sanjeet K. Rivera Gómez, María Abdelaly Torres Sánchez, Darío Díaz González, Lorena Amezcua Valdez, Alejandra Rivera Escoto, Beatriz Adriana Rosales Rivera, Mauricio Armstrong Altrin, John S. López Loera, Héctor Velasco Tapia, Fernando Pandarinath, Kailasa Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals |
| thumbnail | https://rediab.uanl.mx/themes/sandal5/images/online.png |
| title | Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals |
| title_full | Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals |
| title_fullStr | Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals |
| title_full_unstemmed | Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals |
| title_short | Statistically Coherent Calibration of X-Ray Fluorescence Spectrometry for Major Elements in Rocks and Minerals |
| title_sort | statistically coherent calibration of x ray fluorescence spectrometry for major elements in rocks and minerals |
| topic | QD Química |
| url | http://eprints.uanl.mx/17160/1/268.pdf |
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