0 Items
My account
Phone: (011) 7541-421, 3409-301, 3409-335, 6547-293, 3409-310
E-mail: Standards sales: prodaja@iss.rs Education: iss-edukacija@iss.rs Information about standards: infocentar@iss.rs
Stevana Brakusa 2, 11030 Beograd
Main menu

SRPS ISO 1690:2015

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

Apr 29, 2015

General information

90.93     Oct 20, 2023

90.20    Oct 15, 2028

ISS

H047

International Standard

71.060.50  

English  

Plan za 2013. godinu.

Buying

Published

Language in which you want to receive the document.

Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS H.B8.317:1977

NOW

PUBLISHED
SRPS ISO 1690:2015
90.93 Standard confirmed
Oct 20, 2023

Related project

Adopted from ISO 1690:1976