ISO 4279:1977
Aluminium fluoride for industrial use; Determination of sodium content; Flame emission spectrophotometric method
- Standard No.
- ISO 4279:1977
- Release Date
- 1977
- Published By
- International Organization for Standardization (ISO)
- Status
- 2002-05
- Latest
- ISO 4279:1977
- Scope
- Applicable to products having Na contents, expressed as Na2 O, of equal to or more than 0.05 % (m/m). The principle bases on fusion, at a controlled temperature, of a test portion with a mixture of lithium carbonate and boric oxide or with a mixture of lithium carbonate and lithium tetraborate in a platinum or platinum-gold alloy crucible. Extraction of the fused mass with hydeochloric acid solution. Aspiration of the solution into a flame and photometric measurement of the intensity of the radiation emitted at 589 nm.
ISO 4279:1977 history
- 1977 ISO 4279:1977 Aluminium fluoride for industrial use; Determination of sodium content; Flame emission spectrophotometric method
