R. Hahn, P. T. Joseph, G. Salciccioli
Jul 1, 1964
Citations
0
Influential Citations
5
Citations
Journal
Talanta
Abstract
Abstract Bromanilic acid (2,5-dibromo-3,6-dihydroxyquinone) precipitates barium, calcium and strontium quantitatively from weakly acid solution, and forms a coloured complex with zirconyl ions in perchloric add solution. The complex exhibits maximum absorbance at a wavelength of 335 mμ. Beer's law is obeyed in the range from 0.0 to 3.5 ppm of zirconium. Optimum results are obtained in solutions 2.8 M in perchloric acid. The effect of various diverse ions has been investigated. Hafnium gives results identical with zirconium. Other interfering ions are Fe III , Th IV , UO 2 II , Ti IV , phosphate, oxalate, fluoride and sulphate. Errors caused by varying amounts of these ions have been determined. A procedure for the determination of zirconium is given. Bromanilic acid is a more sensitive reagent than chloranilic acid for the determination of zirconium, and can be used over a slightly greater range.