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ISO 3391:1976

Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method
1. 9. 1976.

Опште информације

90.60     5. 3. 2026.

ISO

ISO/TC 226

Međunarodni standard

71.060.50  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

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.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 3391:1976
90.60 Završetak postupka preispitivanja standarda
5. 3. 2026.

Nacionalna preuzimanja

SRPS H.B8.123:1980  
ISS

Kriolit, prirodni i sintetički - Određivanje sadržaja kalcijuma - Metoda atomske apsorpcije

95.99   Povučen

B082 Saznaj više