Potentiometric determination of the stability constants of the fluoroborate-dye complexes used in colorimetric analysis for boron

An extensive bibliography on the determination of boron by means of tetrafluoroborate-dye complexes is given. The stability constants of the fluoroborate—dye complexes are calculated from potentiometric measurements with an Orion fluoroborate ion-selective electrode, for the following nineteen dyes: methylene blue, methylene green, new methylene blue N, thionine, toluidine blue O, malachite green, brilliant green, crystal violet, fuchsine, methyl green, methyl violet, Victoria blue B, brilliant cresyl blue, Nile blue A, rhodamine B, rhodamine 6G, pyronine Y, safranine T and Janus green B. The solubilities of these dyes have been determined by spectrophotometry.