ISO 1690:1976
ISO 1690:1976 Sodium and potassium silicates for industrial use – Determination of silica content – Gravimetric method by insolubilization
CDN $82.00
Description
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.
Edition
1
Published Date
1976-02-01
Status
PUBLISHED
Pages
3
Language
English
Format
Secure PDF
Secure – PDF details
- Save your file locally or view it via a web viewer
- Viewing permissions are restricted exclusively to the purchaser
- Device limits - 3
- Printing – Enabled only to print (1) copy
See more about our Environmental Commitment
Abstract
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.
Previous Editions
Can’t find what you are looking for?
Please contact us at:
Related Documents
-
ISO 2482:1973 Sodium chloride for industrial use – Determination of calcium and magnesium contents – EDTA complexometric methods
CDN $82.00 Add to cart -
ISO 3332:1975 Ammonium sulphate for industrial use – Determination of ammoniacal nitrogen content – Titrimetric method after distillation
CDN $82.00 Add to cart -
ISO 3199:1975 Sodium chlorate for industrial use – Determination of chlorate content – Dichromate titrimetric method
CDN $82.00 Add to cart -
ISO 2992:1974 Ammonium sulphate for industrial use – Determination of iron content – 2,2′- Bipyridyl photometric method
CDN $82.00 Add to cart
