Reference number
ISO 6677:1983
© ISO 2024
ISO 6677:1983
Hexafluorosilicic acid for industrial use — Determination of available fluorine content — Potentiometric method after distillation
Edition 1
1983-05
Withdrawn
Withdrawn (Edition 1, 1983)

Abstract

Covers a method consisting in separating the fluorine from a test portion by distillation in the presence of perchloric acid, followed by potentiometric titration of the distillate with lanthanum nitrate solution using a fluoride ion-selective electrode. Is applicable to products having total available fluorine contents in the range between 15 and 35 % (m/m).

General information

  • Status
     : Withdrawn
    Publication date
     : 1983-05
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 5
  • Technical Committee :
    ISO/TC 47
    ICS :
    71.060.30 
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