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Development of the calibration transfer procedures for the XRF analyser AF-20

Two standardization techniques; Direct (DS) and Picewise Direct Standardization (PDS) were applied to multivariate models developed using x-ray spectra. The data were obtained for the determination of Ca and fe in flying ash from brown coal using low resolution XRF analysis. The analyser AF-20 was u...

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Detalles Bibliográficos
Autores principales: Kowalska, E, Jakowiuk, A
Lenguaje:pol
Publicado: 2001
Materias:
Acceso en línea:http://cds.cern.ch/record/748319
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author Kowalska, E
Jakowiuk, A
author_facet Kowalska, E
Jakowiuk, A
author_sort Kowalska, E
collection CERN
description Two standardization techniques; Direct (DS) and Picewise Direct Standardization (PDS) were applied to multivariate models developed using x-ray spectra. The data were obtained for the determination of Ca and fe in flying ash from brown coal using low resolution XRF analysis. The analyser AF-20 was used with an argon proportional counter and a Cd-109 radioisotope source. Number and comparison of samples from the calibration set were selected. Root mean square error of prediction (RMSEPr) was used as a criterion for assessment of the standardization quality. The best performance was obtained for the PDS method using 5 samples chosen with the leverage method. The RMSEPr value was 4 times lower for Ca determination and 2 times lower for Fe compared with the results without standardization. Software package was designed for fast computation of the standardization transform. The program can be used when the instrument parameters have changed as well as for calibration of the new instrument.
id cern-748319
institution Organización Europea para la Investigación Nuclear
language pol
publishDate 2001
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spelling cern-7483192019-09-30T06:29:59Zhttp://cds.cern.ch/record/748319polKowalska, EJakowiuk, ADevelopment of the calibration transfer procedures for the XRF analyser AF-20Detectors and Experimental TechniquesTwo standardization techniques; Direct (DS) and Picewise Direct Standardization (PDS) were applied to multivariate models developed using x-ray spectra. The data were obtained for the determination of Ca and fe in flying ash from brown coal using low resolution XRF analysis. The analyser AF-20 was used with an argon proportional counter and a Cd-109 radioisotope source. Number and comparison of samples from the calibration set were selected. Root mean square error of prediction (RMSEPr) was used as a criterion for assessment of the standardization quality. The best performance was obtained for the PDS method using 5 samples chosen with the leverage method. The RMSEPr value was 4 times lower for Ca determination and 2 times lower for Fe compared with the results without standardization. Software package was designed for fast computation of the standardization transform. The program can be used when the instrument parameters have changed as well as for calibration of the new instrument.INCT-8-B-01oai:cds.cern.ch:7483192001
spellingShingle Detectors and Experimental Techniques
Kowalska, E
Jakowiuk, A
Development of the calibration transfer procedures for the XRF analyser AF-20
title Development of the calibration transfer procedures for the XRF analyser AF-20
title_full Development of the calibration transfer procedures for the XRF analyser AF-20
title_fullStr Development of the calibration transfer procedures for the XRF analyser AF-20
title_full_unstemmed Development of the calibration transfer procedures for the XRF analyser AF-20
title_short Development of the calibration transfer procedures for the XRF analyser AF-20
title_sort development of the calibration transfer procedures for the xrf analyser af-20
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/748319
work_keys_str_mv AT kowalskae developmentofthecalibrationtransferproceduresforthexrfanalyseraf20
AT jakowiuka developmentofthecalibrationtransferproceduresforthexrfanalyseraf20