ISO 5439:1978 PDF
Acid-grade fluorspar — Determination of available fluorine content — Potentiometric method after distillation
Open preview (PDF)Acid-grade fluorspar — Determination of available fluorine content — Potentiometric method after distillationTitle (English):
ISO 5439:1978
Acid-grade fluorspar — Determination of available fluorine content — Potentiometric method after distillation
- Document status:
- Withdrawn
- Format:
- Electronic (PDF)
- Number of pages:
- 6
- Publication date:
- September 1, 1978
- Edition:
- ISO IS 5439 edition 1 version 1
- ICS:
- 73.080
Description (English):
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 %.
Technical details
- Technical committee
- ISO/TC 175 - Fluorspar
- SKU
- ISO 5439:1978
