Sodium fluoride primarily used for the production of aluminium — Determination of silica content — R...
Specifies a spectrophotometric method, using the reduced molybdosilicate, for determining the silica content of sodium fluoride. Applicable to products of which the phosphorus pentoxide content does not exceed 0,02 % (m/m).
Anhydrous hydrogen fluoride for industrial use — Determination of water content — Karl Fischer metho...
Applicable to products having a water content between 0.01 % (m/m) and 0.5 % (m/m). Is supplemented by ISO 3700 and intended for reference purposes. Bases on addition of a cooled test portion to cooled dry pyridine containing 5 % of anhydous hydrogen fluoride. The apparatus for measuring the test portion and titration and the measuring vessel are shon in figures. Subsequent electrometric…
Aluminium oxide primarily used for the production of aluminium — Determination of calcium content — ...
This method is applicable to products having Ca contents greater than 0,003 % (m/m). The principle consists in dissolution of a test portion by the influence of hydrochloric acid under pressure. Addition of sodium ions to promote and to stabilize the emission of calcium, and of lanthanum ions or triethanolamine to increase the sensitivity. Aspiration of the solution into an acetylene-dinitrogen…
Radioactive materials — Packagings — Test for contents leakage and radiation leakage
Specifies some methods for prototypes of transport packaging, but may not be considered universally applicable. The leak test ist provided for the containment system of containers and type A packaging for low specific activity liquid or powder sources. The homogeneity test refers to the outer surface of the shielding or the whole packaging. Both methods are inappropriate when the containment…
Sodium fluoride primarily used for the production of aluminium — Determination of soluble sulphates ...
Applicable to products having SO4 contents of more than 0.05 % (m/m). Covers the dissolution of the test portion in hydrochloric acid and evaporation in hydrochloric acid solution for drying. Dissolution of the residue in a hydrochloric acid solution. Measurement of the turbidity obtained by precipitation, under specified conditions, of barium sulphate using a spectrophotometer at a wavelength of…
Sodium fluoride primarily used for the production of aluminium — Determination of iron content — 1,1...
Applicable to the determination of Fe contents, expressed as Fe2 O3 , of more than 0.020 % (m/m). Covers the dissolution of a test portion by alkaline fusion by means of sodium carbonate and boric acid. Dissolving of the residue with nitric acid solution and reduction of iron(III) by means of hydroxylammonium chloride. Formation of the iron(II)-1,10-phenanthroline complex in a buffered medium at…
