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TitleAn assessment of variable sample thickness for pXRF analysis of unconsolidated sediment
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorHoldsworth, E; Knight, R DORCID logo; Valiquette, L J; Landon-Browne, A R R; Russell, H A JORCID logo
SourceGeological Survey of Canada, Open File 8638, 2021, 18 pages, Open Access logo Open Access
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedNRCan photo(s) in this publication
File formatreadme
File formatpdf; rtf; xlsx (Microsoft® Excel®)
Subjectssurficial geology/geomorphology; geochemistry; Science and Technology; Nature and Environment; field methods; in-field instrumentation; x-ray fluorescence analyses; spectrometric analyses; sample preparation; sampling techniques; sediments; tills; till samples; geochemical analyses; Methodology
Illustrationsphotographs; plots; tables
ProgramGroundwater Geoscience Archetypal Aquifers of Canada
Released2021 04 19
AbstractFor optimal results manufactures of pXRF spectrometers recommend analyses of samples that meet the criteria of infinite thickness, which for unconsolidated sediments is approximately 25 mm in thickness and compacted to ensure there are no air gaps.
To quantify individual elemental response and the theoretical required infinite sample thickness Certified Reference Materials (CRM's) Till 1 to 4, ranging in thickness from 1 to 40 mm, were analysed in Soil and Mining mode.
Results show a relationship between filters used to process data and sample thickness. For samples less than infinite thickness, pXRF analyses often returned results that were substantially greater than, or less than, results returned from samples of infinite thickness. For these samples post data collection correction factors can be applied to adjust results for greater accuracy.
Summary(Plain Language Summary, not published)
The objective of this report is to document the effect of variable sample thickness on pXRF results for unconsolidated sediment. The relationship between individual elemental response and the theoretical required infinite sample thickness was investigated using Certified Reference Materials (CRM's) Till 1 to 4 ranging in thickness from 1 to 40 mm. Approximately 6200 analyses were carried out in Soil and Mining mode.

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