レニウム(VII),モリブデン(VI),タングステン(VI)の薄層クロマトグラフィー
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概要
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Separation of rhenium(VII), molybdenum(VI) and tungsten(VI) can be effected by thin-layer chromatography on an alumina-coated polyethylene terephthalate film (Eastman Chromagram Sheet 6062, 100 μ thick) in simple aqueous solutions of acids or salts. All the solvent systems tested which include the dilute aqueous solutions (<0.1<I>N</I>) of thiocyanic acid, ammonium thiocyanate, hydrochloric, acetic, oxalic, malonic, tartaric, citric acids and ammonia, are found to give the most favorable resolution of the three elements. <I>R</I><SUB><I>f</I></SUB> values are in the order Re (VII)>Mo(VI)>W(VI) irrespective of the developing solvents.