NORMSERVIS s.r.o.

ISO 3391:1976

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

STANDARD published on 1.9.1976

English -
electronic design (pdf) (58.40 USD)
English -
Print design (58.40 USD)


French -
electronic design (pdf) (58.40 USD)
French -
Print design (58.40 USD)

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
Category: Technical standards 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.