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008221110t20212021onca    ob   f000 0 eng d
040 |aCaOODSP|beng|erda|cCaOODSP
0861 |aM183-2/8801E-PDF
1001 |aKnight, Ross David, |d1956- |eauthor.
24510|aUranium, thorium, and potassium analyses using pXRF spectrometry / |cR.D. Knight, B.A. Kjarsgaard, E.G. Potter, and A. Plourde.
264 1|a[Ottawa] : |bGeological Survey of Canada, |c2021.
264 4|c©2021
300 |a1 online resource (23 pages) : |bcolour illustrations + |e2 sets of graphs.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aOpen file, |x2816-7155 ; |v8801
504 |aIncludes bibliographical references (pages 21-23).
5203 |a"The application of portable XRF spectrometry (pXRF) for determining concentrations of uranium (U), thorium (Th) and potassium (K) was evaluated using a combination of 12 Certified Reference Materials, 17 Standard Reference Materials, and 25 rock samples collected from areas of known U occurrences or mineralization. Samples were analysed by pXRF in Soil, Mining Cu/Zn and Mining Ta/Hf modes. Resulting pXRF data were compared to published recommended values, obtained by total or near total digestion methods with ICP-MS and ICP-OES analysis. Results for pXRF show a linear relationship, for thorium, potassium, and uranium (<5000 ppm U) as compared to the recommended concentrations. However, above 5000 ppm U, pXRF results show an exponential relationship with under reporting of pXRF concentrations compared to recommended values. Accuracy of the data can be improved by post-analysis correction using linear regression equations for potassium and thorium, and samples with <5000 ppm uranium; an exponential correction curve is required at >5000 ppm U. In addition, pXRF analyses of samples with high concentrations of uranium (e.g. >1 wt.% U) significantly over-estimated potassium contents as compared to the published values, indicating interference between the two elements not calibrated by the manufacturer software"--Abstract, page 1.
650 0|aUranium|xAnalysis.
650 0|aThorium|xAnalysis.
650 0|aPotassium|xAnalysis.
650 0|aRocks|xAnalysis.
650 0|aOres|xSampling and estimation.
650 0|aX-ray spectroscopy.
650 6|aUranium|xAnalyse.
650 6|aThorium|xAnalyse.
650 6|aPotassium|xAnalyse.
650 6|aRoches|xAnalyse.
650 6|aMinerais|xÉchantillonnage et estimation.
650 6|aSpectroscopie des rayons X.
7102 |aGeological Survey of Canada, |eissuing body.
830#0|aOpen file (Geological Survey of Canada)|v8801.|w(CaOODSP)9.506878
85640|qPDF|s16.10 MB|uhttps://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8801-eng.pdf|z(report)
85640|qPDF|s718 KB|uhttps://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8801-1-eng.pdf|z(Research activity 1 graphs)
85640|qPDF|s522 KB|uhttps://publications.gc.ca/collections/collection_2023/rncan-nrcan/m183-2/M183-2-8801-2-eng.pdf|z(Research activity 2 graphs)
8564 |qHTML|sN/A|uhttps://doi.org/10.4095/328973|z(complete dataset)