Colorimetric Determination of Fluoride Ion

Abstract

The Steiger and Merwin colorimetric procedure for the estimation of fluoride ion has been revised and adapted for the analysis of fluoride ion in the presence of large quantities of phosphate. Extrapolation procedures have been developed for the analysis of fluophosphate compounds capable of being hydrolyzed in acid media to fluoride and phosphate.

Light Absorption Spectrometry

“…The following papers illustrate studies of. miscellaneous methods: fading procedures for fluoride with (a) titanium plus hydrogen peroxide, in the presence of various interfering ions (142), (b) iron plus thiocyanate (87), and (c) iron plus sulfosalicyclic acid (114); the use of mixtures of potassium dichromate and cupric sulfate as permanent standards for matching molybdovanadophosphoric acid solutions (172); the use of the tetraiodopalladinate ion for determining palladium (195) and the ruthenate ion for determining ruthenium (ISO); the spectrophotometric determination of six of the rare earth metals (139); and a modified method using titanium plus hydrogen peroxide for estimating monofluophosphate ion through a determination of the hydroly'zed fluoride (76).…”