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Sample preparation method for major‐element analyses of carbonate rocks by X‐ray spectrometry
Author(s) -
King BiShia,
Vivit Davison
Publication year - 1988
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/xrs.1300170303
Subject(s) - carbonate , calibration , loss on ignition , sample (material) , sample preparation , analytical chemistry (journal) , calcination , matrix (chemical analysis) , mineralogy , mass spectrometry , x ray fluorescence , lithium (medication) , carbonate rock , materials science , chemistry , fluorescence , optics , metallurgy , chromatography , physics , environmental chemistry , biochemistry , quantum mechanics , catalysis , medicine , endocrinology
A sample preparation method is described which permits fast and accurate wavelength‐dispersive, x‐ray fluorescence analysis of ten major oxides in carbonate rocks. The sample is first ground into a fine powder, then calcined, its loss‐on‐ignition (LOI) is determined and finally it is fused into a glass disc with lithium tetraborate at 1100°C using a 1:10 sample‐to‐flux ratio. Geological reference standards and synthetic standards are used for calibration. Matrix effects are corrected empirically using Lachance‐Traill correction algorithms. The accuracy and precision of the method were assessed by the analysis of several NBS carbonate reference standards.