NORMSERVIS s.r.o.

ISO 3391:1976

Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method

NORMA vydána dne 1.9.1976

Anglicky -
Elektronické PDF (1351.90 CZK)
Anglicky -
Tištěné (1351.90 CZK)


Francouzsky -
Elektronické PDF (1351.90 CZK)
Francouzsky -
Tištěné (1351.90 CZK)

The information about the standard:

Designation standards: ISO 3391:1976
Publication date standards: 1.9.1976
The number of pages: 4
Approximate weight : 12 g (0.03 lbs)
Country: International technical standard
Kategorie: Technické normy ISO

Annotation of standard text ISO 3391:1976 :

Description / Abstract: Describes the preparation of the calibration graph and the dissolution of a test portion in concentrated sulphuric acid and heating on a hot-plate until the hydrofluoric acid has evaporated. Treatment of the residue with concentrated hydrochloric acid. Aspiration of the solution into an acetylene/dinitrogen monoxide flame and spectrophotometric measurement of the absorption of the 422.7-nm line emitted by a calcium hollow cathode lamp.