ISO 5439:1978
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ISO 5439:1978
11485

Abstract 

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 %.


General information 

  •  :  Withdrawn
     : 1978-09
  •  : 1
     : 6
  •  : ISO/TC 175 Fluorspar
  •  :
    73.080 Non-metalliferous minerals

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