Some Special Problems in the X-Ray Spectrographic Analysis of Plate and Container Glass
The X-ray spectrographic analysis of glass is straightforward for most of the elements with atomic numbers greater than 11. However, three of the elements require special attention, since matrix effects are serious enough to require correction. These three elements are calcium, silicon, and sulfur.
The X-ray spectrographic analysis of calcium in glass is somewhat more difficult since any potassium in the glass reduces the intensity of the Ca Kα line by absorption. A correction factor has been found which when applied to the X-ray data gives results in excellent agreement with wet chemical analysis. The evaluation of the factor is discussed.
The analysis of silica in glass is quite difficult for glasses from different sources. It is less difficult when analyzing glass from the same tank for quality control. Calcium is the interfering element in the analysis. The nature of its interference and a procedure for overcoming it are discussed.
The analysis of sulfur in glass is made difficult by two interferences—a change in background with calcium content and the presence of the WL γ6 fifth-order line very near the S Kα line. Both interferences must be evaluated. A procedure for this analysis is presented.
KeywordsAnalyze Crystal Lithium Fluoride Glass Standard Ammonium Dihydrogen Phosphate Ammonium Dihydrogen Phosphate
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