ISO 1690:1976

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

Best Price Guarantee Feb 15, 1976 English 1 Pages

Sub Total (1 Item(s)) $ 0.00
Estimated Shipping $ 0.00
Total (Pre-Tax) $ 0.00

You own the digital copy of this edition

View in Library
or
International Organization for Standardization Logo

ISO 1690:1976

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

PUBLISH DATE 1976
ISO 1690:1976

The procedure is based on **evaporation to dryness** of a test portion previously acidified with hydrochloric acid.

Dissolution of the soluble salts, filtration, and washing of the insoluble matter.

Second evaporation of the filtrate and washings under the same conditions, further dissolution of the soluble salts, filtration, and washing.

Calcination and weighing of the two lots of insoluble matter simultaneously.

Volatilization of silica by heating with hydrofluoric and sulphuric acids and weighing of the residue after calcination.

The difference in mass represents the silica present in the test portion.

Loading...

Failed to load document history.

Publish Date Document Id Type View