ISO 5439:1978
Acid-grade fluorspar — Determination of available fluorine content — Potentiometric method after distillation
Acid-grade fluorspar — Determination of available fluorine content — Potentiometric method after distillation
- Статус документа:
- Отменён
- Формат:
- Электронный (PDF)
- Количество страниц:
- 6
- Дата публикации:
- 1 сентября 1978 г.
- Издание:
- ISO IS 5439 edition 1 version 1
- ICS:
- 73.080
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 %.
Технические детали
- Технический комитет
- ISO/TC 175 - Fluorspar
- SKU
- ISO 5439:1978
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