Abstract
Silicic acid was precipitated as potassium fluosilicate in nitric acid solution and determined by titration with standard sodium hydroxide, after the precipitate was dissolved in hot water.
Iron and steels were dissolved in nitric acid, carbon that separated out oxidised with potassium chlorate and then silicon was precipitated with potassium chloride and hydrofluoric acid as potassium fluosilicate. Basic slag was dissolved in nitric acid directly, while acidic one after fusion with potassium carbonate, and then potassium fluosilicate was precipitated.
The time required for this analysis is about 1725 minutes, so this method is suited for the rapid analysis in steel works.
This method was also applied to the determination of silica in several rocks and fluorspar.
