Amine Extraction-Spectrographic Determination of Tantalum, Titanium, Tungsten, and Zirconium in Plutonium.

Nonferrous metallurgy. II. Zirconium, hafnium, vanadium, niobium, tantalum, chromium, molybdenum, and tungsten

“…Formazan: Mo, W (525) Hexamatoxylin: Petroleum (308) Acetylacetone: Study of interferences (465) JV-(o-tolyl)-benzohydroxamic acid: Study of conditions and interferences (310) jV-(p-chlorophenyl)-benzohydroxamic acid: Study of conditions and interferences (311) jV-phenylbenzohydroxamic acid: Study of conditions and interferences (554) 4-Methoxybenzothiohydroxamic acid: Study of conditions and interferences (507) 2-Naphthohydroxamic acid: Study of conditions and interferences (32) 1-Naphthylamine: Study of conditions and interferences (8) Diphenylaminesulfonate: Study of conditions (353) Ammonium sulfide: Steel, Fe (607) Tris-(2-hydroxyalkyl)-amines: Study of conditions (188) 2-Thenoyltrifluoroacetone: Study of conditions and interferences (109) Rutin: Study of conditions and interferences (115) Glyoxal bis-(2-mercaptoanil): Study of conditions and interferences (93) Potassium chlorate-aniline: Re (454) Potassium chlorate-benzidine: Study of conditions and interferences (552) Potassium bromate-aniline: Water, Re (290) Ammonium persulfate-gallic acid: Water (146) Potassium chlorate-potassium bromide: Study of conditions (49) Potassium bromate-potassium bromide-ascorbic acid: Study of conditions (50) (Continued on page 11 SR) shkina and Smirnova (341)• Ko (254) used an amine extraction before the spectrochemical determination of zirconium in plutonium. Huff (203) used spectrographic determinations in a study of the behavior of nineteen elements on a strong-base ion exchange resin and applied the method to the determination of impurities in tantalum.…”

“…Following the extraction of plutonium with trioctylamine, Ko (254) determined tantalum and niobium spectrographicallv. Brooks (66) used a pyrosulfate fusion followed by d.c. arc excitation for the determination of tantalum and other impurities in niobium.…”

“…Spectrographic analysis of column effluents was used by Huff (203) in his study of 19 elements in a strong base ion exchange resin using mixed nitric and hydrofluoric acid solutions. Ko (254) determined tungsten in the aqueous phase spectrographically after extracting the matrix material, plutonium, into tri-n-octylamine in xylene. In order to determine tungsten in aerosols, Liplavk and Chernousova (294) collected the sample by passing 30 to 50 liters of air through a filter paper, ashed the paper, and mixed the ash with carbon powder before spectrographic excitation.…”