Evaluation of the utility of handheld XRF in meteoritics
Identifieur interne : 001419 ( Istex/Corpus ); précédent : 001418; suivant : 001420Evaluation of the utility of handheld XRF in meteoritics
Auteurs : Florian J. Zurfluh ; Beda A. Hofmann ; Edwin Gnos ; Urs EggenbergerSource :
- X‐Ray Spectrometry [ 0049-8246 ] ; 2011-11.
Abstract
We tested a handheld X‐ray fluorescence instrument with adaptable matrix correction for its suitability in meteoritics. We report here the instrument setup, precision and accuracy and present examples of applications. With a measuring time of 300 s, it is possible to collect accurate data for K, Ca, Ti, Cr, Mn, Fe, Co, Ni, Sr and Ba that are needed for the identification of doubtful meteorites and the nondestructive classification of chondrites and achondrites. The factory‐supplied calibration curve of the instrument was fine tuned for our purposes with the use of well‐analyzed meteorite powders, pressed pellets and meteorite hand specimens as standards. Relative errors of 10% to 20% are reached for the mentioned elements. The instrument was tested in the hot desert of Oman while searching for meteorites and also in the laboratory while doing research on meteorites. The main applications of the instrument are the identification and classification of meteorites, the quantification of terrestrial elemental contamination (Sr and Ba) and detection of Mn‐rich desert varnish. It is possible to discriminate the major meteorite groups using Fe/Mn and Ni values. Handheld X‐ray fluorescence is also useful in identifying meteorites belonging to the same fall event. Copyright © 2011 John Wiley & Sons, Ltd.
Url:
DOI: 10.1002/xrs.1369
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We report here the instrument setup, precision and accuracy and present examples of applications. With a measuring time of 300 s, it is possible to collect accurate data for K, Ca, Ti, Cr, Mn, Fe, Co, Ni, Sr and Ba that are needed for the identification of doubtful meteorites and the nondestructive classification of chondrites and achondrites. The factory‐supplied calibration curve of the instrument was fine tuned for our purposes with the use of well‐analyzed meteorite powders, pressed pellets and meteorite hand specimens as standards. Relative errors of 10% to 20% are reached for the mentioned elements. The instrument was tested in the hot desert of Oman while searching for meteorites and also in the laboratory while doing research on meteorites. The main applications of the instrument are the identification and classification of meteorites, the quantification of terrestrial elemental contamination (Sr and Ba) and detection of Mn‐rich desert varnish. 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It is possible to discriminate the major meteorite groups using Fe/Mn and Ni values. Handheld X‐ray fluorescence is also useful in identifying meteorites belonging to the same fall event. 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We report here the instrument setup, precision and accuracy and present examples of applications. With a measuring time of 300 s, it is possible to collect accurate data for K, Ca, Ti, Cr, Mn, Fe, Co, Ni, Sr and Ba that are needed for the identification of doubtful meteorites and the nondestructive classification of chondrites and achondrites. The factory‐supplied calibration curve of the instrument was fine tuned for our purposes with the use of well‐analyzed meteorite powders, pressed pellets and meteorite hand specimens as standards. Relative errors of 10% to 20% are reached for the mentioned elements. The instrument was tested in the hot desert of Oman while searching for meteorites and also in the laboratory while doing research on meteorites. The main applications of the instrument are the identification and classification of meteorites, the quantification of terrestrial elemental contamination (Sr and Ba) and detection of Mn‐rich desert varnish. It is possible to discriminate the major meteorite groups using Fe/Mn and Ni values. Handheld X‐ray fluorescence is also useful in identifying meteorites belonging to the same fall event. Copyright © 2011 John Wiley & Sons, Ltd.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Evaluation of the utility of handheld XRF in meteoritics</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>Handheld XRF in meteoritics</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Evaluation of the utility of handheld XRF in meteoritics</title></titleInfo><name type="personal"><namePart type="given">Florian J.</namePart><namePart type="family">Zurfluh</namePart><affiliation>Institute of Geological Sciences, Baltzerstrasse 1 + 3, CH‐3012, Bern, Switzerland</affiliation><affiliation>Florian J. 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We report here the instrument setup, precision and accuracy and present examples of applications. With a measuring time of 300 s, it is possible to collect accurate data for K, Ca, Ti, Cr, Mn, Fe, Co, Ni, Sr and Ba that are needed for the identification of doubtful meteorites and the nondestructive classification of chondrites and achondrites. The factory‐supplied calibration curve of the instrument was fine tuned for our purposes with the use of well‐analyzed meteorite powders, pressed pellets and meteorite hand specimens as standards. Relative errors of 10% to 20% are reached for the mentioned elements. The instrument was tested in the hot desert of Oman while searching for meteorites and also in the laboratory while doing research on meteorites. The main applications of the instrument are the identification and classification of meteorites, the quantification of terrestrial elemental contamination (Sr and Ba) and detection of Mn‐rich desert varnish. It is possible to discriminate the major meteorite groups using Fe/Mn and Ni values. Handheld X‐ray fluorescence is also useful in identifying meteorites belonging to the same fall event. Copyright © 2011 John Wiley & Sons, Ltd.</abstract><note type="funding">Swiss National Science Foundation (SNF) - No. 200020–119937; </note><subject><genre>keywords</genre><topic>handheld XRF</topic><topic>meteorite</topic><topic>terrestrial contamination</topic><topic>bulk composition</topic><topic>classification</topic></subject><relatedItem type="host"><titleInfo><title>X‐Ray Spectrometry</title></titleInfo><titleInfo type="abbreviated"><title>X‐Ray Spectrom.</title></titleInfo><genre type="journal">journal</genre><subject><genre>article-category</genre><topic>Research article</topic></subject><identifier type="ISSN">0049-8246</identifier><identifier type="eISSN">1097-4539</identifier><identifier type="DOI">10.1002/(ISSN)1097-4539</identifier><identifier type="PublisherID">XRS</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>40</number></detail><detail type="issue"><caption>no.</caption><number>6</number></detail><extent unit="pages"><start>449</start><end>463</end><total>15</total></extent></part></relatedItem><identifier type="istex">B9CF205D06AB733C339B2E575BCA4D45D89A9116</identifier><identifier type="DOI">10.1002/xrs.1369</identifier><identifier type="ArticleID">XRS1369</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright © 2011 John Wiley & Sons, Ltd.Copyright © 2011 John Wiley & Sons, Ltd.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource><recordOrigin>John Wiley & Sons, Ltd</recordOrigin></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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