Normas ISO

Cryolite, natural and artificial -- Determination of iron content -- 1,10- Phenanthroline photometric method

Cryolite, natural and artificial -- Determination of fluorine content -- Modified Willard-Winter method

Sodium and potassium silicates for industrial use -- Determination of total alkalinity -- Titrimetric method

Sodium and potassium silicates for industrial use -- Determination of carbonates content -- Gas-volumetric method

Sodium and potassium silicates for industrial use -- Determination of silica content -- Gravimetric method by insolubilization

Sodium and potassium silicates for industrial use -- Calculation of the ratio : silicon dioxide/sodium oxide or silicon dioxide/potassium oxide