ISO 5439:1978
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 %.
OEN:
ISO
Langue:
English
Code(s) de l'ICS:
73.080
Statut:
Annulée
Date de Publication:
1978-08-31
Numéro Standard:
ISO 5439:1978