Determination of silicon dioxide in colloidal silica
Chaigneau, M.; Chastagnier, M.
Annales Pharmaceutiques Francaises 50(5-6): 314-316
1992
ISSN/ISBN: 0003-4509 PMID: 1307677 Document Number: 400941
This is made without using hydrofluoric acid. The dissolution of silicas is carried out by ammonium fluoride in aqueous solution with potassium chloride. The potassium fluosilicate obtained is then isolated; its mass corresponds to 3,666 x SiO2. The values obtained corroborate the validity of this method.
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