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Abstract
The limitations of the volumetric silico-fluoride methods were studied and a modified procedure has been worked out for rapid and accurate estimation of silica. Standard deviation of the results is 0.154 and one sample can be analysed in duplicate in 2 hours. The method has been used for analysis of quartz, clays and clay products, glass, alumino silicate refractories and felspar. Other silicate constituents, including boron, antimony and fluorine did not interfere.