ISO 2072:1981
Aluminium oxide primarily used for the production of aluminium; Determination of zinc content; PAN photometric method
- Standard No.
- ISO 2072:1981
- Release Date
- 1981
- Published By
- International Organization for Standardization (ISO)
- Latest
- ISO 2072:1981
- Scope
- The 1-(2-pyridilazo)-2-naphthol method is applicable to products having zinc contents in the range between 0,002 % (m/m) and 0,12 % (m/m). Alkaline fusion of a test portion, and dissolution of the fused mass in nitric acid. Separation of the zinc in the form of its thiocyanate by extraction with 4-methylpentan-2-one. Re-extraction of the zinc with an aqueous hydrochloric acid solution. Formation of the PAN-zinc complex, at pH 7,5, in the presence of tartaric acid, sodium thiosulphate and 1-nitrose-2-naphthol-3,6-du
ISO 2072:1981 history
- 1981 ISO 2072:1981 Aluminium oxide primarily used for the production of aluminium; Determination of zinc content; PAN photometric method
