Standard

ISO 2124:1972

Jun 1972 Withdrawn

Existing or new amendments and versions must be purchased separately.

Language English French

Services Online + Pdf CHF 67,00 Online CHF 57,00

There are no extended editions available for this standard

There are no available corrigendum or amendments for this standard. Any future corrigendum and amendments will be added automatically for subscribers.

Abstract

The principle consists in neutralization of the alkalinity of a test portion, previously dissolved, in presence of methyl red as indicator. Addition of sodium fluoride, which reacts with the silicic acid, forming a euaivalent quantity of sodium hydroxide. Addition of a measured volume of standard volumetric hydrochloric acid solution in excess, followed for diluting by ethanol. Filtration of the silicic compound thus obtained, which is insoluble under these conditions. Titration of the excess of hydrochloric acid in the filtrate with standard volumetric sodium hydroxide solution in presence of methyl red as indicator.

Products specifications

Standard from ISO
Published: June 1 1972
Withdrawn: May 27 2002
Edition: 1
Document type: IS
Pages
ISBN:

Publisher: ISO
Distributor: ISO
ICS: 71.060.50
International TC: ISO/TC 47

Extended editions Extended editions (0)

Version history Related Corrigenda and Amendments (0)

Abstract

Products specifications