Fluoride
ions are used in battery electrolytes in fluoride shuttle
batteries. Since organic solvents are used in battery electrolytes,
there is a growing demand to develop appropriate methods for quantifying
fluoride ion concentration in organic solvents. In this study, a fluoride
ion-selective electrode (ISE) for organic solutions is proposed as
an electrode of the second kind. A Ag|AgF electrode was made via the
anodization of a silver wire in propylene carbonate (PC) containing
dissolved fluoride ions. The resultant electrode exhibits a stable
linear response of the open circuit potential to the logarithm of
the fluoride ion concentration in PC solutions over a range of 10–4–10–2 mol dm–3. The lower and upper limits of the linear response were interpreted
in terms of the solubility and the formation of a silver fluoride
complex. The use of this electrode of the second kind is suitable
for the analysis of fluoride ions in organic solutions and is a promising
concept for the development of ISEs for the detection of ions in organic
solutions under highly restrictive conditions.