Fluoride was estimated using an ion-selective electrode (ISE) with a pH/ISE meter (Orion 4-Star meter).
The ion of choice was released by iontophoresis from a micropipette located in the brain and the concentration measured as a function of time about 100 μm away using an ion-selective microelectrode.
Na+ determinations were conducted at UNN using an ion-selective electrode method.
Fluorine analysis, using an ion selective electrode, was performed to dicalcium and monocalcium phosphates.
However, in this technique ion fluxes are converted to voltage signals using an ion selective microelectrode at a small amplitude of μV, which is easy to be interfered by the ambient noise.
Ions in diluted saliva (1 : 50 v/v deionized water) were measured using an ion selective electrodes (elit; Nico Ltd, Harrow, UK) calibrated against standard solutions.
Moreover, the degree of micellar counterion binding for these surfactants was determined by using a bromide ion-selective electrode, which indicated relatively high values (0.8 0.9) for Cn-2Am (n = 18, 20, and 22) and more common values (0.5 0.8) for Cn-3Am (n = 18, 20, and 22).
Fluoride concentrations were determined by potentiometric method using an Orion ion-selective F electrode, as described by Palczewska-Komsa et al. [ 20].
Samples were dissolved in 0.1 M of perchloric acid and mixed for 1 h at 95° C. Fluoride concentration was determined by potentiometric method using an Orion ion-selective electrode (Gutowska et al. 2009).
