Standard

ISO 5438:1993

Mar 1993 Withdrawn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 method specified is based on decomposition of a test portion by fusion with sodium carbonate and subsequent acidification with hydrochloric acid in the presence of boric acid to complex fluoride, formation of the molybdosilicic acid complex and selective reduction to the blue molybdosilicic acid complex with addition of tartaric acid to prevent interference from phosphate, spectrometric measurement of the absorbance of the coloured complex at the wavelength of maximum absorption (about 795 nm). Applies to products having silica contents, expressed as SiO2, in the range 0,05 % (m/m) to 4,0 % (m/m).

Products specifications

Standard from ISO
Published: March 18 1993
Withdrawn: March 3 2010
Period for objection until: April 22 1992
Edition: 2
Document type: IS
Pages
ISBN:

Publisher: ISO
Distributor: ISO
ICS: 73.080
International TC: ISO/TC 175

Product Relations

Revises: ISO 5438:1985

ISO 5438:1993

Create subscription

ISO 5438:1993

ISO 5438:1985

Abstract

Products specifications

Product Relations

Product life cycle

Extended editions Extended editions (0)

Version history Related Corrigenda and Amendments (0)

Version history History (2)

ISO 5438:1993

ISO 5438:1985

Abstract

Products specifications

Product Relations

Product life cycle