ISO 4283:1993
All grades of fluorspar; determination of carbonate content; titrimetric method
- Standard No.
- ISO 4283:1993
- Release Date
- 1993
- Published By
- International Organization for Standardization (ISO)
- Status
- Latest
- ISO 4283:1993
- Scope
- The principle of the method specified is treatment of a test portion with hydrochloric acid solution, absorption of the evolved carbon dioxide in barium hydroxide solution, neutralization of excess alkali with hydrochloric acid solution, addition of an exactly measured excess of a standard volumetric hydrochloric acid solution to dissolve the precipitated barium carbonate and back-titration with a standard volumetric sodium hydroxide solution using methyl orange as indicator. The method is applicable to products having carbonate contents equal to or greater than 0,04 % (m/m).
ISO 4283:1993 history
- 1993 ISO 4283:1993 All grades of fluorspar; determination of carbonate content; titrimetric method
- 1990 ISO 4283:1990 All grades of fluorspar — Determination of carbonate content — Titrimetric method
- 1978 ISO 4283:1978 Acid-grade fluorspar — Determination of carbonate content — Titrimetric method
