ISO 6229:1980
$11.05
Sodium hexafluorosilicate for industrial use — Determination of free silica content — Gravimetric method
| Published By | Publication Date | Number of Pages |
| ISO | 1980-07 | 4 |
Covers a method, the principle of which is based on the extraction from a test portion of compounds soluble in acetic acid solution and weighing of the residue after heating at 600 °C, removal from the residue, of silica by evaporation with hydrofluoric acid solution and of residual fluorides by heating with ammonia solution, and reweighing of the residue after heating at 600 °C. Is applicable to products having free silica contents equal to or greater than 0,05 % (m/m).
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