The Determination of Fluoride in Urine Using the “Ponalkit®-F”

Abstract

Urinary fluorides are generally measured by means of the fluoride electrode. The F-electrode method is superior to the spectrophotometric method because of the need to perform preliminary sample treatments, but in the case of many samples, this method is inferior to the spectrophotometric method from the respect of measuring time.
In this study, we determined the urinary fluoride concentrations using the “Ponalkit-F”, that is, the extraction of the La-ALC-F chelate complex by organic solvent after separation by microdiffusion.
Fluoride concentrations in urine taken at random from thirty male adults, were 0.30±0.15 ppm (mean±S.D.) using microdiffusion and the “Ponalkit-F”, and 0.30±0.14 ppm by means of the F-electrode.
In short, this method seems to be by no means inferior to the direct fluoride determination of urine using the F-electrode.