Extraction and purification of quartz in rock using hot-phosphoric acid for in situ cosmogenic exposure dating

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dc.contributor.authorMifsud, Cen_AU
dc.contributor.authorFujioka, Ten_AU
dc.contributor.authorFink, Den_AU
dc.date.accessioned2013-04-23T04:05:28Zen_AU
dc.date.available2013-04-23T04:05:28Zen_AU
dc.date.issued2013-01-01en_AU
dc.date.statistics2013-04-08en_AU
dc.description.abstractQuartz extraction and purification is essential for the successful measurement of Be-10 and Al-26 by AMS for exposure dating. The common procedure involves repetitive etching by ultrasonic heating and agitation in a dilute aqueous HF solution (2% w/w), which has proven adequate for quartz rich rock (i.e., granite, quartzite). We have developed an alternative method using hot phosphoric acid (250 degrees C), which preferentially dissolves silicates but not quartz. This method is particularly effective on samples with very low quartz abundance or with cryptocrystalline silica (i.e., greywacke, silcrete, chert) to enhance quartz recovery. We describe the method in detail and present data that compares the efficiency and the benefits of the two methods. © 2013, Elsevier Ltd.en_AU
dc.identifier.citationMifsud, C., Fujioka, T., & Fink, D. (2013). Extraction and purification of quartz in rock using hot-phosphoric acid for in situ cosmogenic exposure dating. Paper presented to the Twelfth International Conference on Accelerator Mass Spectrometry, Wellington, New Zealand, 20-25 March 2011. In Zondervan, A., Prior, C., Bruhn, F., & Sparks, R. (Eds), Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 294, 203-207. doi:10.1016/j.nimb.2012.08.037en_AU
dc.identifier.conferenceenddate25 March 2011en_AU
dc.identifier.conferencenameTwelfth International Conference on Accelerator Mass Spectrometryen_AU
dc.identifier.conferenceplaceWellington, New Zealanden_AU
dc.identifier.conferencestartdate20 March 2011en_AU
dc.identifier.editorsZondervan, A., Prior, C., Bruhn, F., & Sparks, R.en_AU
dc.identifier.govdoc4868en_AU
dc.identifier.issn0168-583Xen_AU
dc.identifier.journaltitleNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atomsen_AU
dc.identifier.pagination203-207en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4573en_AU
dc.identifier.urihttps://doi.org/10.1016/j.nimb.2012.08.037en_AU
dc.identifier.volume294en_AU
dc.language.isoenen_AU
dc.publisherElsevier Science BVen_AU
dc.subjectExtractionen_AU
dc.subjectPurificationen_AU
dc.subjectQuartzen_AU
dc.subjectGranitesen_AU
dc.subjectBerylliumen_AU
dc.subjectAluminiumen_AU
dc.titleExtraction and purification of quartz in rock using hot-phosphoric acid for in situ cosmogenic exposure datingen_AU
dc.typeConference Paperen_AU
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