logo

Standards Manage Your Business

We Manage Your Standards

ISO

ISO 1694:1976

Cryolite, natural and artificial — Determination of iron content — 1,10- Phenanthroline photometric method

Standard Details

Applies for the determination of natural and synthetic materials having a molar ratio sodium fluoride/aluminium trifluoride between 3 and 1,7 approximately. The method is applicable to products having an iron content equal to or greater than 0,020 % (m/m). The principle consists in dissolution of a test portion by either alkaline or acid fusion. Reduction of iron(III) with hydroxylammonium chloride, formation of the complex iron(II)-1, 10-phenathroline in a buffered medium at pH value between 3,5 and 4,2. Photometric measurement of the coloured complex at a wavelength of about 510 nm. Applies ISO Recommendation R 1694-1970.

General Information

Status : Published
Standard Type: Main
Document No: ISO 1694:1976
Document Year: 1976
Pages: 5
Edition: 1
  • Section Volume:
  • ISO/TC 226. Materials for the production of primary aluminium

Life Cycle

Currently Viewing

Published
ISO 1694:1976
Knowledge Corner

Expand Your Knowledge and Unlock Your Learning Potential - Your One-Stop Source for Information!

© Copyright 2024 BSB Edge Private Limited.

Enquire now +