[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-135595-105":59,"doc-detail-135595-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","aliquot-preparation-strategies-and-their-impact-on-inter-aliquot-reproducibility-in-portable-osl-measurements","ALIQUOT PREPARATION STRATEGIES AND THEIR IMPACT ON INTER-ALIQUOT REPRODUCIBILITY IN PORTABLE OSL MEASUREMENTS","","Portable optically stimulated luminescence (OSL) readers have rapidly expanded for extracting latent stratigraphic information from late Quaternary bulk sediments. While such work assumes aliquot luminescence signals are reproducible, no study systematically evaluates how aliquot preparation and sample size affect inter-aliquot consistency. This study tests reproducibility using portable OSL readings on multiple aliquot preparation approaches for postglacial eolian dune samples from Alberta, Canada, comparing monogranular and multilayer formats across blue-OSL and IRSL signals.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/aliquot-preparation-strategies-and-their-impact-on-inter-aliquot-reproducibility-in-portable-osl-measurements/135595/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/aliquot-preparation-strategies-and-their-impact-on-inter-aliquot-reproducibility-in-portable-osl-measurements/135595.png","ImageObject",300,407,{"name":92,"@type":93},"Terk","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-17","2026-08-21",true,{"@type":102,"interactionType":103,"userInteractionCount":29},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What problem does the study address in portable OSL measurements?","Question",{"text":112,"@type":113},"It addresses the lack of explicit evidence on whether aliquot preparation strategies improve inter-aliquot reproducibility in portable OSL research.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which aliquot preparation approaches were compared?",{"text":117,"@type":113},"Four approaches were tested: monogranular equal-volume portions, monogranular equal-weight portions, monogranular layers on adhesive segments with equal area, and multilayer portions with equal weight.",{"name":119,"@type":110,"acceptedAnswer":120},"What preparation method produced the highest reproducibility for blue-OSL signals?",{"text":121,"@type":113},"Multilayer aliquots prepared with equal weights (12 g) consistently produced the highest blue-OSL inter-aliquot reproducibility.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},135595,1787315747,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":29,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":139,"language":140,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":67,"update_tm":129,"read_time":36},1099525198933,"https://ap-avatar.wpscdn.com/davatar_155a257f0dc6eb9ab79c44ca47cae57d","GEOCHRONOMETRIA 53 (2026) 220626 DOI 10.20858/geochr/220626  \nAvailable online at [https://www.geochronometria.com/](https://www.geochronometria.com/)  \nALIQUOT PREPARATION STRATEGIES AND THEIR IMPACT ON INTER-ALIQUOT REPRODUCIBILITY IN PORTABLE OSL MEASUREMENTS  \nKEN MUNYIKWA  \nCentre for Science, Athabasca University, 1 University Drive, Athabasca, Alberta, T9S 3A3, Canada  \nReceived 17 October 2025 Accepted 13 April 2026  \nAbstract  \nOver the past decade, the use of portable optically stimulated luminescence (OSL) readers has expanded rapidly, enabling the recovery of latent stratigraphic information from bulk sediments of late Quaternary age. These applications assume that luminescence signals from sample aliquots are reproducible, yet no study has explicitly examined preparation strategies that optimize inter-aliquot consistency. Consequently, no standardized methods for sample preparation exist in portable OSL research. This study initiates this discussion by testing how aliquot preparation and sample size influence reproducibility. Four samples were collected from postglacial eolian dunes in Alberta, Canada. For each sample, 20 aliquots were prepared using four approaches, yielding 320 aliquots:  \n(a) monogranular layers of equal volume portions (~1 .5 g), (b) monogranular layers of equal-weight (1 .5 g),(c) monogranular layers mounted on double-sided adhesive segments of equal area (~1 .0 g), and (d) multilayer portions of equal weight (12 .0 g) . All aliquots were analyzed with a portable OSL reader. Statistical results showed that for blue-OSL signals, reproducibility varied both among samples and across preparation methods. However, multilayer aliquots prepared with equal weights (12 g) consistently produced the highest reproducibility, suggesting that larger grain populations enhance inter-aliquot consistency. For IRSL signals, no preparation method of  \nfered a clear advantage.  \nKeywords  \nportable OSL reader; luminescence; aliquots; sample preparation; monogranular layers; multilayer; inter-aliquot  \nconsistency; reproducibility  \n1. Introduction  \nA growing number of publications has emerged over the last 10–15 years demonstrating the practicality of portable OSL readers in geoscience and archaeological field investigations that examine late Quaternary sequences. The utility of the devices lies in their capacity to rapidly and costeffectively generate chronological and proxy stratigraphic information about depositional environments, in contrast to relying solely on standard luminescence dating procedures. The devices are lightweight, such that they can betaken to the field or closer to the site. Importantly, sample  \nCorresponding author: K. Munyikwa  \ne-mail: kenm@athabascau.ca  \nmeasurements are much simpler than with standard OSL dating protocols including that no preheating is required. Finally, and most critically, sample measurements using portable OSL readers are commonly performed on unprocessed bulk samples, an aspect that takes a significant amount of time with regular OSL dating where pure quartz or feldspar sand grains (in the coarse-grains method) or fine silt (when using the fine grain approach) are extracted.  \nThe range of studies in which the devices have been used includes contextualization of luminescence characteristics of terrestrial depositional sequences (e.g. Sanderson and Murphy, 2010; Bateman et al., 2015; Portenga and Bishop, 2016; Adolph et al., 2021; Boyd et al., 2022; Schulze et al., 2022; Rex et al., 2022; Robins et al., 2022, 2023; Euzen et al., 2024; Rizza et al., 2024; Roman et al., 2024) and those of archaeologic sedimentary sites (e.g. Srivastava et al., 2023; Sanchez-Pardo et al., 2024;  \nBen-Melech et al., 2024; Robins et al., 2023) . In many cases, such studies have been conducted to help screen samples for regular OSL dating. Alternatively, beyond sample screening, portable OSL measurements have also been used to elucidate substratigraphic information that can shed light ","cbCaiedzacbO2cDi","https://ap.wps.com/l/cbCaiedzacbO2cDi","pdf",1739180,16,"English","# Introduction\n# Methodology and Aliquot Preparation Strategies\n# Results on Inter-Aliquot Reproducibility (Blue-OSL and IRSL)\n# Discussion and Implications for Portable OSL Measurements","[{\"question\":\"What problem does the study address in portable OSL measurements?\",\"answer\":\"It addresses the lack of explicit evidence on whether aliquot preparation strategies improve inter-aliquot reproducibility in portable OSL research.\"},{\"question\":\"Which aliquot preparation approaches were compared?\",\"answer\":\"Four approaches were tested: monogranular equal-volume portions, monogranular equal-weight portions, monogranular layers on adhesive segments with equal area, and multilayer portions with equal weight.\"},{\"question\":\"What preparation method produced the highest reproducibility for blue-OSL signals?\",\"answer\":\"Multilayer aliquots prepared with equal weights (12 g) consistently produced the highest blue-OSL inter-aliquot reproducibility.\"}]","ALIQUOT PREPARATION STRATEGIES AND THEIR IMPACT ON INTER-ALIQUOT REPRODUCIBILITY IN PORTABLE OSL MEASUREMENTS | PDF"]