Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of phosphorus content — Atomic absorption spectrometric method after extraction

The information about the standard:

Designation standards: ISO 6374:1981
Publication date standards: 1.10.1981
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: International technical standard
Kategorie: Technische Normen ISO

Annotation of standard text ISO 6374:1981 :

Description / Abstract: Specifies a method based on the fusion of a test portion with sodium carbonate and boric acid and dissolution in perchloric acid solution, followed by formation of the ammonium molybdophosphate complex and extraction of the complex with isobutyl acetate. The solution is absorbed into an acetylene/dinitrogen monoxide flame and the molybdenum, and hence the phosphorus, is determined by measuring the absorbance of the 379,8 nm line emitted by a molybdenum hollow-cathode lamp.