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- W2016408946 abstract "A spectrophotometric determination of scandium in silicate rocks has been developed with arsenazo as the color reagent. After the decomposition of samples with a hydrofluoric-perchloric acid mixture, traces of scandium are separated from interferences by cation- and anion-exchange in acid sulfate media and anion exchange in hydrochloric acid solution. The successive 3 steps, with an intermediate concentration step, yield scandium in a sufficiently pure state for spectrophotometric determination. On propose une méthode spectrophotométrique pour le dosage du scandium dans des roches silicatées, au moyen d'arsenazo comme réactif. Après décomposition des échantillons à l'aide d'un mélange acide fluorhydrique-acide perchlorique, des traces de scandium sont séparées par échangeur de cations et d'anions, en milieu sulfate acide, et par échangeur d'anions en milieu acide chlorhydrique. On obtient ainsi un scandium suffisamment pur pour un dosage spectrophotométrique. Es wurde eine spektralphotometrische Bestimmung von Scandium in Silikaten unter Verwendung von Arsenazo entwickelt. Nach der Zerstörung der Probe mit einem Gemisch aus Fluorwasserstoff und Perchlorsäure werden Spuren Scandium von störenden Elementen durch Kationen- und Anionenaustausch abgetrennt." @default.
- W2016408946 created "2016-06-24" @default.
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- W2016408946 date "1967-01-01" @default.
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- W2016408946 title "Determination of trace quantities of scandium in silicate rocks by a combined ion exchange-spectrophotometric method" @default.
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- W2016408946 doi "https://doi.org/10.1016/s0003-2670(01)80640-1" @default.
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