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The atomic number Z=0: Loss and gain on ignition in XRF analysis treated by the JN‐equations
Author(s) -
de Jongh Willy K.
Publication year - 1979
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.1300080203
Subject(s) - ignition system , analyte , loss on ignition , analytical chemistry (journal) , fluorescence , oxide , atomic number , chemistry , atomic physics , physics , thermodynamics , chromatography , environmental chemistry , optics , organic chemistry
Abstract During fusion of uncalcined oxide samples there may be a loss of a variable mass of volatile constituents, corresponding with the loss on ignition (LOI). On the other hand, partially reduced samples, such as sinters of iron ores, may contain one or more elements in various states of oxidation related to the gain on ignition in air (GOI). Both phenomena influence the analyte X‐ray fluorescence intensities obtained from the fused sample. Full explanations are given along with a rigorous mathematical treatment for a proposed method that has demonstrated its practical value in the past decade. It is based on the de Jongh–Norrish equations in which the mass difference LOI–GOI is treated as one element with the assigned atomic number zero. References are made to practical results.