000 01901 am a22002173u 4500
042 _adc
100 1 0 _aMachlan, Lawrence A.
_eauthor
_9319
700 1 0 _aHague, John L.
_eauthor
_9320
245 0 0 _aSeparation of Hafnium from Zirconium and Their Determination: Separation by Anion-Exchange
260 _b[Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology,
_c1962.
500 _a/pmc/articles/PMC5324969/
520 _aA procedure is described for the separation of hafnium from zirconium and their individual determination. The sample is dissolved in sulfuric and hydrofluoric acids and the hydrofluoric acid removed by fuming. After dilution with water, the solution is transferred to a column containing a strong quaternary amine anion-exchange resin (Dowex-1). The hafnium is eluted with diluted (3.5 percent by volume) sulfuric acid solution. Zirconium is removed by elution with 10 percent by volume sulfuric acid solution. The elements are precipitated with cupferron, ignited, and weighed as the oxides. For samples containing from twenty to eighty percent of zirconium, a second separation of the hafnium fraction using the column is necessary.
540 _a
540 _ahttps://creativecommons.org/publicdomain/zero/1.0/
540 _aThe Journal of Research of the National Bureau of Standards Section A is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.
546 _aen
690 _aArticle
655 7 _aText
_2local
786 0 _nJ Res Natl Bur Stand A Phys Chem
856 4 1 _uhttp://dx.doi.org/10.6028/jres.066A.053
_zConnect to this object online.
999 _c601
_d601