ISO 9504:1993
Metallurgical-grade fluorspar; determination of antimony content; solvent extraction atomic absorption spectrometric method
- Standard No.
- ISO 9504:1993
- Release Date
- 1993
- Published By
- International Organization for Standardization (ISO)
- Status
- Latest
- ISO 9504:1993
- Scope
- The principle of the method specified is to decompose a test portion by a mixture of nitric, hydrofluoric and perchloric acids, dissolving the salts in hydrochloric acid after evaporation to fumes of sulfuric acid, extracting the antimony from a dilute hydrochloric acid solution of the decomposed test portion into a solution of tri-n-octylphosphine oxide in 4-methyl-2-pentanone, aspirating the extract into the air/acetylene flame of an atomic absorption spectrometer, and measuring the absorbance at 217,6 nm. Applies to products having an antimony content equal to or greater than 0,001 % (m/m).
ISO 9504:1993 history
- 1993 ISO 9504:1993 Metallurgical-grade fluorspar; determination of antimony content; solvent extraction atomic absorption spectrometric method
- 1990 ISO 9504:1990 Metallurgical-grade fluorspar — Determination of antimony content — Solvent extraction atomic absorption spectrometric method
