ISO 5439:1978
Withdrawn
Acid-grade fluorspar — Determination of available fluorine content — Potentiometric method after distillation
Hardcopy , PDF
English, French
09-01-1978
03-05-2019
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 %.
| Committee |
ISO/TC 175
|
| DocumentType |
Standard
|
| Pages |
6
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| Standards | Relationship |
| NBN T 03 545 : 1983 | Identical |
| BS 5659-5:1979 | Identical |
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