Standard

ISO 3391:1976

Sep 1976 Published

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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.

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Standard from ISO
Published: 1 September 1976
Edition: 1
Document type: IS
ISBN:

Publisher ISO
Distributor ISO
ICS 71.060.50
ISO TC ISO/TC 226

ISO 3391:1976

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