ISO 5439:1978
Acid-grade fluorspar; Determination of available fluorine content; Potentiometric method after distillation
- Standard No.
- ISO 5439:1978
- Release Date
- 1978
- Published By
- International Organization for Standardization (ISO)
- Status
- Latest
- ISO 5439:1978
- Scope
- Specifies a potentiometric method using a fluoride-ion sensitive electrode. After destillation of fluorine from the test portion in the presence of perchloric acid the distillate shall be titrated with lanthane nitrate solution. Applicable to products having a calcium fluoride content greater than 90 %.
ISO 5439:1978 history
- 1978 ISO 5439:1978 Acid-grade fluorspar; Determination of available fluorine content; Potentiometric method after distillation
