|Title||An assessment of variable sample thickness for pXRF analysis of unconsolidated sediment|
|Licence||Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences.|
|Author||Holdsworth, E; Knight, R D; Valiquette, L J; Landon-Browne, A R R; Russell, H A J|
|Source||Geological Survey of Canada, Open File 8638, 2021, 18 pages, https://doi.org/10.4095/328195 Open Access|
|Publisher||Natural Resources Canada|
|Related||NRCan photo(s) in this
|File format||pdf; rtf; xlsx (Microsoft® Excel®)|
|Subjects||surficial 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|
|Illustrations||photographs; plots; tables|
|Program||Groundwater Geoscience Archetypal Aquifers of Canada|
|Released||2021 04 19|
|Abstract||For 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.