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Interlaboratory study for coral Sr/Ca and other element/Ca ratio measurements

Identifieur interne : 002F93 ( Istex/Curation ); précédent : 002F92; suivant : 002F94

Interlaboratory study for coral Sr/Ca and other element/Ca ratio measurements

Auteurs : Ed C. Hathorne [Allemagne] ; Alex Gagnon [États-Unis] ; Thomas Felis [Allemagne] ; Jess Adkins [États-Unis] ; Ryuji Asami [Japon] ; Wim Boer [Pays-Bas] ; Nicolas Caillon [France] ; David Case [États-Unis] ; Kim M. Cobb [États-Unis] ; Eric Douville [France] ; Peter Demenocal [États-Unis] ; Anton Eisenhauer [Allemagne] ; Dieter Garbe-Schönberg [Allemagne] ; Walter Geibert [Royaume-Uni] ; Steven Goldstein [États-Unis] ; Konrad Hughen [États-Unis] ; Mayuri Inoue [Japon] ; Hodaka Kawahata [Japon] ; Martin Kölling [Allemagne] ; Florence L. Cornec ; Braddock K. Linsley [États-Unis] ; Helen V. Mcgregor [Australie] ; Paolo Montagna [États-Unis] ; Intan S. Nurhati [États-Unis, Singapour, Indonésie] ; Terrence M. Quinn [États-Unis] ; Jacek Raddatz [Allemagne] ; Hélène Rebaubier [France] ; Laura Robinson [États-Unis] ; Aleksey Sadekov [Royaume-Uni] ; Rob Sherrell [États-Unis] ; Dan Sinclair [États-Unis] ; Alexander W. Tudhope [Royaume-Uni] ; Gangjian Wei ; Henri Wong [Australie] ; Henry C. Wu [États-Unis, Allemagne] ; Chen-Feng You [Taïwan]

Source :

RBID : ISTEX:FE037BBA55109BCD46A11C8BB68D67A9DE1A6F23

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Abstract

The Sr/Ca ratio of coral aragonite is used to reconstruct past sea surface temperature (SST). Twenty‐one laboratories took part in an interlaboratory study of coral Sr/Ca measurements. Results show interlaboratory bias can be significant, and in the extreme case could result in a range in SST estimates of 7°C. However, most of the data fall within a narrower range and the Porites coral reference material JCp‐1 is now characterized well enough to have a certified Sr/Ca value of 8.838 mmol/mol with an expanded uncertainty of 0.089 mmol/mol following International Association of Geoanalysts (IAG) guidelines. This uncertainty, at the 95% confidence level, equates to 1.5°C for SST estimates using Porites, so is approaching fitness for purpose. The comparable median within laboratory error is <0.5°C. This difference in uncertainties illustrates the interlaboratory bias component that should be reduced through the use of reference materials like the JCp‐1. There are many potential sources contributing to biases in comparative methods but traces of Sr in Ca standards and uncertainties in reference solution composition can account for half of the combined uncertainty. Consensus values that fulfil the requirements to be certified values were also obtained for Mg/Ca in JCp‐1 and for Sr/Ca and Mg/Ca ratios in the JCt‐1 giant clam reference material. Reference values with variable fitness for purpose have also been obtained for Li/Ca, B/Ca, Ba/Ca, and U/Ca in both reference materials. In future, studies reporting coral element/Ca data should also report the average value obtained for a reference material such as the JCp‐1.

Url:
DOI: 10.1002/ggge.20230

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ISTEX:FE037BBA55109BCD46A11C8BB68D67A9DE1A6F23

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Florence L. Cornec
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Gangjian Wei
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<mods:affiliation>State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry Chinese Academy of Sciences, China, Guangdong</mods:affiliation>
<wicri:noCountry code="subField">Guangdong</wicri:noCountry>
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Le document en format XML

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<name sortKey="Case, David" sort="Case, David" uniqKey="Case D" first="David" last="Case">David Case</name>
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<name sortKey="Cobb, Kim M" sort="Cobb, Kim M" uniqKey="Cobb K" first="Kim M." last="Cobb">Kim M. Cobb</name>
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<name sortKey="Demenocal, Peter" sort="Demenocal, Peter" uniqKey="Demenocal P" first="Peter" last="Demenocal">Peter Demenocal</name>
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<name sortKey="Eisenhauer, Anton" sort="Eisenhauer, Anton" uniqKey="Eisenhauer A" first="Anton" last="Eisenhauer">Anton Eisenhauer</name>
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<name sortKey="Garbe Chonberg, Dieter" sort="Garbe Chonberg, Dieter" uniqKey="Garbe Chonberg D" first="Dieter" last="Garbe-Schönberg">Dieter Garbe-Schönberg</name>
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<name sortKey="Geibert, Walter" sort="Geibert, Walter" uniqKey="Geibert W" first="Walter" last="Geibert">Walter Geibert</name>
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<name sortKey="Goldstein, Steven" sort="Goldstein, Steven" uniqKey="Goldstein S" first="Steven" last="Goldstein">Steven Goldstein</name>
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<name sortKey="Hughen, Konrad" sort="Hughen, Konrad" uniqKey="Hughen K" first="Konrad" last="Hughen">Konrad Hughen</name>
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<mods:affiliation>Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA</mods:affiliation>
<country xml:lang="fr">États-Unis</country>
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<name sortKey="Inoue, Mayuri" sort="Inoue, Mayuri" uniqKey="Inoue M" first="Mayuri" last="Inoue">Mayuri Inoue</name>
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<mods:affiliation>Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan</mods:affiliation>
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<name sortKey="Kawahata, Hodaka" sort="Kawahata, Hodaka" uniqKey="Kawahata H" first="Hodaka" last="Kawahata">Hodaka Kawahata</name>
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<name sortKey="Kolling, Martin" sort="Kolling, Martin" uniqKey="Kolling M" first="Martin" last="Kölling">Martin Kölling</name>
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<name sortKey="Cornec, Florence L" sort="Cornec, Florence L" uniqKey="Cornec F" first="Florence L." last="Cornec">Florence L. Cornec</name>
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<name sortKey="Linsley, Braddock K" sort="Linsley, Braddock K" uniqKey="Linsley B" first="Braddock K." last="Linsley">Braddock K. Linsley</name>
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<mods:affiliation>Department of Atmospheric and Environmental Sciences, University at Albany‐State University of New York, Albany, New York, USA</mods:affiliation>
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<name sortKey="Mcgregor, Helen V" sort="Mcgregor, Helen V" uniqKey="Mcgregor H" first="Helen V." last="Mcgregor">Helen V. Mcgregor</name>
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<name sortKey="Montagna, Paolo" sort="Montagna, Paolo" uniqKey="Montagna P" first="Paolo" last="Montagna">Paolo Montagna</name>
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<name sortKey="Nurhati, Intan S" sort="Nurhati, Intan S" uniqKey="Nurhati I" first="Intan S." last="Nurhati">Intan S. Nurhati</name>
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<mods:affiliation>Singapore‐MIT Alliance for Research and Technology, Singapore</mods:affiliation>
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<mods:affiliation>Center for Oceanography and Marine Technology, Surya University, Indonesia</mods:affiliation>
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<name sortKey="Quinn, Terrence M" sort="Quinn, Terrence M" uniqKey="Quinn T" first="Terrence M." last="Quinn">Terrence M. Quinn</name>
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<mods:affiliation>Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Texas, Austin, USA</mods:affiliation>
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<name sortKey="Raddatz, Jacek" sort="Raddatz, Jacek" uniqKey="Raddatz J" first="Jacek" last="Raddatz">Jacek Raddatz</name>
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<name sortKey="Rebaubier, Helene" sort="Rebaubier, Helene" uniqKey="Rebaubier H" first="Hélène" last="Rebaubier">Hélène Rebaubier</name>
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<name sortKey="Robinson, Laura" sort="Robinson, Laura" uniqKey="Robinson L" first="Laura" last="Robinson">Laura Robinson</name>
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<name sortKey="Sadekov, Aleksey" sort="Sadekov, Aleksey" uniqKey="Sadekov A" first="Aleksey" last="Sadekov">Aleksey Sadekov</name>
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<affiliation wicri:level="1">
<mods:affiliation>Now at Department of Earth Sciences, Cambridge University, Cambridge, UK</mods:affiliation>
<country xml:lang="fr">Royaume-Uni</country>
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<author>
<name sortKey="Sherrell, Rob" sort="Sherrell, Rob" uniqKey="Sherrell R" first="Rob" last="Sherrell">Rob Sherrell</name>
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<name sortKey="Sinclair, Dan" sort="Sinclair, Dan" uniqKey="Sinclair D" first="Dan" last="Sinclair">Dan Sinclair</name>
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<name sortKey="Tudhope, Alexander W" sort="Tudhope, Alexander W" uniqKey="Tudhope A" first="Alexander W." last="Tudhope">Alexander W. Tudhope</name>
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<name sortKey="Wei, Gangjian" sort="Wei, Gangjian" uniqKey="Wei G" first="Gangjian" last="Wei">Gangjian Wei</name>
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<mods:affiliation>State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry Chinese Academy of Sciences, China, Guangdong</mods:affiliation>
<wicri:noCountry code="subField">Guangdong</wicri:noCountry>
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<name sortKey="Wong, Henri" sort="Wong, Henri" uniqKey="Wong H" first="Henri" last="Wong">Henri Wong</name>
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<mods:affiliation>Australian Nuclear Science and Technology Organisation, Institute for Environmental Research, New South Wales, Sydney, Australia</mods:affiliation>
<country xml:lang="fr">Australie</country>
<wicri:regionArea>Australian Nuclear Science and Technology Organisation, Institute for Environmental Research, New South Wales, Sydney</wicri:regionArea>
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<author>
<name sortKey="Wu, Henry C" sort="Wu, Henry C" uniqKey="Wu H" first="Henry C." last="Wu">Henry C. Wu</name>
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<mods:affiliation>Department of Atmospheric and Environmental Sciences, University at Albany‐State University of New York, Albany, New York, USA</mods:affiliation>
<country xml:lang="fr">États-Unis</country>
<wicri:regionArea>Department of Atmospheric and Environmental Sciences, University at Albany‐State University of New York, Albany, New York</wicri:regionArea>
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<affiliation wicri:level="1">
<mods:affiliation>Now at MARUM‐Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany</mods:affiliation>
<country xml:lang="fr">Allemagne</country>
<wicri:regionArea>Now at MARUM‐Center for Marine Environmental Sciences, University of Bremen, Bremen</wicri:regionArea>
</affiliation>
</author>
<author>
<name sortKey="You, Chen Eng" sort="You, Chen Eng" uniqKey="You C" first="Chen-Feng" last="You">Chen-Feng You</name>
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<mods:affiliation>Department of Earth Sciences, National Cheng Kung University, Tainan, Taiwan</mods:affiliation>
<country xml:lang="fr">Taïwan</country>
<wicri:regionArea>Department of Earth Sciences, National Cheng Kung University, Tainan</wicri:regionArea>
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<mods:affiliation>Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA</mods:affiliation>
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<term>Geosyst</term>
<term>Giant clam</term>
<term>Giant clam reference material</term>
<term>Gray area</term>
<term>Hathorne</term>
<term>Homogeneity test results</term>
<term>Homogeneity tests</term>
<term>Homogenous reference material</term>
<term>Impurity</term>
<term>Inductively</term>
<term>Info value</term>
<term>Initial studies</term>
<term>Inoue</term>
<term>Intensity ratios</term>
<term>Interlaboratory</term>
<term>Interlaboratory bias</term>
<term>Interlaboratory bias component</term>
<term>Interlaboratory comparisons</term>
<term>Interlaboratory study</term>
<term>Internal reproducibility</term>
<term>International association</term>
<term>Iodp expedition</term>
<term>Isotope</term>
<term>Isotope dilution</term>
<term>Isotope geochemistry</term>
<term>Isotope ratios</term>
<term>Kane</term>
<term>Kawahata</term>
<term>Kiel</term>
<term>Lab</term>
<term>Laboratory error</term>
<term>Many elements</term>
<term>Many laboratories</term>
<term>Marine chemistry</term>
<term>Matrix</term>
<term>Matrix effects</term>
<term>Mcculloch</term>
<term>Measurement methods</term>
<term>Median</term>
<term>Ocean research kiel</term>
<term>Okai</term>
<term>Other elements</term>
<term>Other laboratories</term>
<term>Other ratio measurements</term>
<term>Planetary sciences</term>
<term>Plasma mass spectrometry</term>
<term>Porites</term>
<term>Porites corals</term>
<term>Precision contest</term>
<term>Provisional value</term>
<term>Quantifying uncertainty</term>
<term>Recent years</term>
<term>Reference material</term>
<term>Reference materials</term>
<term>Reference values</term>
<term>Reproducibility</term>
<term>Reproducibility ratio</term>
<term>Residual organics</term>
<term>Robust</term>
<term>Same manner</term>
<term>Same manufacturer</term>
<term>Schrag</term>
<term>Sinclair</term>
<term>Single dissolution</term>
<term>Skeleton</term>
<term>Spectrometry</term>
<term>Spike</term>
<term>Spike calibration</term>
<term>Standard deviation</term>
<term>Standard deviations</term>
<term>Standard solution</term>
<term>Standard solutions</term>
<term>Standard uncertainty</term>
<term>Statistical methods</term>
<term>Surface conditions</term>
<term>Surface temperature</term>
<term>Test portion dissolutions</term>
<term>Test portion size</term>
<term>Test portions</term>
<term>Trace elements</term>
<term>Uncertainty</term>
<term>Water temperature</term>
<term>Weight uncertainty</term>
<term>Woods hole</term>
<term>Youden plots</term>
</keywords>
<keywords scheme="Teeft" xml:lang="en">
<term>Accreditation qual</term>
<term>Acta</term>
<term>Analytical model</term>
<term>Appropriate data point</term>
<term>Atmospheric sciences</term>
<term>Average slope</term>
<term>Average value</term>
<term>Average values</term>
<term>Bremen</term>
<term>Calibration standards</term>
<term>California institute</term>
<term>Carbonate</term>
<term>Columbia university</term>
<term>Consensus values</term>
<term>Coral</term>
<term>Coral figure</term>
<term>Coral measurements</term>
<term>Coral ratio data report</term>
<term>Coral ratios</term>
<term>Coral record</term>
<term>Coral reference materials</term>
<term>Coral samples</term>
<term>Coral skeleton</term>
<term>Coral skeletons</term>
<term>Coral table</term>
<term>Correge</term>
<term>Cosmochim</term>
<term>Coverage factor</term>
<term>Current study</term>
<term>Data sets</term>
<term>Deviation number</term>
<term>Different batches</term>
<term>Different bottles</term>
<term>Different dissolutions</term>
<term>Different laboratories</term>
<term>Different labs</term>
<term>Different materials</term>
<term>Different techniques</term>
<term>Dissolution</term>
<term>Dissolution acid</term>
<term>Earth sciences</term>
<term>Environmental research</term>
<term>Environmental sciences</term>
<term>Error bars</term>
<term>External precision</term>
<term>External reproducibility</term>
<term>Extreme case</term>
<term>Felis</term>
<term>Full assessment</term>
<term>General information</term>
<term>Geochem</term>
<term>Geochemical</term>
<term>Geochemical analysis</term>
<term>Geochemistry</term>
<term>Geochim</term>
<term>Geological survey</term>
<term>Geophys</term>
<term>Georem database</term>
<term>Georgia institute</term>
<term>Geostand</term>
<term>Geosyst</term>
<term>Giant clam</term>
<term>Giant clam reference material</term>
<term>Gray area</term>
<term>Hathorne</term>
<term>Homogeneity test results</term>
<term>Homogeneity tests</term>
<term>Homogenous reference material</term>
<term>Impurity</term>
<term>Inductively</term>
<term>Info value</term>
<term>Initial studies</term>
<term>Inoue</term>
<term>Intensity ratios</term>
<term>Interlaboratory</term>
<term>Interlaboratory bias</term>
<term>Interlaboratory bias component</term>
<term>Interlaboratory comparisons</term>
<term>Interlaboratory study</term>
<term>Internal reproducibility</term>
<term>International association</term>
<term>Iodp expedition</term>
<term>Isotope</term>
<term>Isotope dilution</term>
<term>Isotope geochemistry</term>
<term>Isotope ratios</term>
<term>Kane</term>
<term>Kawahata</term>
<term>Kiel</term>
<term>Lab</term>
<term>Laboratory error</term>
<term>Many elements</term>
<term>Many laboratories</term>
<term>Marine chemistry</term>
<term>Matrix</term>
<term>Matrix effects</term>
<term>Mcculloch</term>
<term>Measurement methods</term>
<term>Median</term>
<term>Ocean research kiel</term>
<term>Okai</term>
<term>Other elements</term>
<term>Other laboratories</term>
<term>Other ratio measurements</term>
<term>Planetary sciences</term>
<term>Plasma mass spectrometry</term>
<term>Porites</term>
<term>Porites corals</term>
<term>Precision contest</term>
<term>Provisional value</term>
<term>Quantifying uncertainty</term>
<term>Recent years</term>
<term>Reference material</term>
<term>Reference materials</term>
<term>Reference values</term>
<term>Reproducibility</term>
<term>Reproducibility ratio</term>
<term>Residual organics</term>
<term>Robust</term>
<term>Same manner</term>
<term>Same manufacturer</term>
<term>Schrag</term>
<term>Sinclair</term>
<term>Single dissolution</term>
<term>Skeleton</term>
<term>Spectrometry</term>
<term>Spike</term>
<term>Spike calibration</term>
<term>Standard deviation</term>
<term>Standard deviations</term>
<term>Standard solution</term>
<term>Standard solutions</term>
<term>Standard uncertainty</term>
<term>Statistical methods</term>
<term>Surface conditions</term>
<term>Surface temperature</term>
<term>Test portion dissolutions</term>
<term>Test portion size</term>
<term>Test portions</term>
<term>Trace elements</term>
<term>Uncertainty</term>
<term>Water temperature</term>
<term>Weight uncertainty</term>
<term>Woods hole</term>
<term>Youden plots</term>
</keywords>
<keywords scheme="Wicri" type="topic" xml:lang="fr">
<term>Brême</term>
<term>Sciences de la terre</term>
<term>Recherche sur l'environnement</term>
<term>Géochimie</term>
<term>Spectrométrie</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front>
<div type="abstract">The Sr/Ca ratio of coral aragonite is used to reconstruct past sea surface temperature (SST). Twenty‐one laboratories took part in an interlaboratory study of coral Sr/Ca measurements. Results show interlaboratory bias can be significant, and in the extreme case could result in a range in SST estimates of 7°C. However, most of the data fall within a narrower range and the Porites coral reference material JCp‐1 is now characterized well enough to have a certified Sr/Ca value of 8.838 mmol/mol with an expanded uncertainty of 0.089 mmol/mol following International Association of Geoanalysts (IAG) guidelines. This uncertainty, at the 95% confidence level, equates to 1.5°C for SST estimates using Porites, so is approaching fitness for purpose. The comparable median within laboratory error is <0.5°C. This difference in uncertainties illustrates the interlaboratory bias component that should be reduced through the use of reference materials like the JCp‐1. There are many potential sources contributing to biases in comparative methods but traces of Sr in Ca standards and uncertainties in reference solution composition can account for half of the combined uncertainty. Consensus values that fulfil the requirements to be certified values were also obtained for Mg/Ca in JCp‐1 and for Sr/Ca and Mg/Ca ratios in the JCt‐1 giant clam reference material. Reference values with variable fitness for purpose have also been obtained for Li/Ca, B/Ca, Ba/Ca, and U/Ca in both reference materials. In future, studies reporting coral element/Ca data should also report the average value obtained for a reference material such as the JCp‐1.</div>
</front>
</TEI>
</record>

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