ISSN:
0049-8246
Keywords:
Chemistry
;
Analytical Chemistry and Spectroscopy
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
An improved x-ray fluorescence method has been developed for the analysis of chrome containing refractory materials (raw materials, in process and final products). It involves the fusion of the powdered samples with a mixture of sodium hexametaphosphate and lithium metaborate in the presence of lanthanum oxide into a glass disc followed by polishing of the disc before exposure to the x-rays. Three British standards, two South African Standards and one NBS Standard were used for standardizing the method. SiO2, Fe2O3, Al2O3, CaO MgO and Cr2O3 were used in the standardization because these compounds constitute the majority of the materials under analysis. Linear regression analysis of the data showed that all the lines were linear, the coefficient of determination being equal or close to 1.00 with a mean error of less than ±3.5%, excepting CaO which had a mean error of ±8.6% because of its low concentration and the larger variance in its standard value.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/xrs.1300110107
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