Active standard | Published: 01/09/1976

ISO 1694:1976

Cryolite, natural and artificial — Determination of iron content — 1,10- Phenanthroline photometric method
(Cryolithe, naturelle et artificielle — Dosage du fer — Méthode photométrique a la phénanthroline-1,10)

Available languages: English, French

Available design: electronic design (pdf), Print design

from 65.40 USD show on eshop

Detail information

Designation: ISO 1694:1976

Publication date: 01/09/1976

Pages: 5

Country: International technical standard

Where to buy?

You can buy at www.mystandards.biz

Anotation

Description / Abstract: 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.

Popular Publishers

full catalog