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|Title:||SEPARATION OF NIOBIUM FROM CHLORIDE MEDIA BY SOLVENT-EXTRACTION WITH DICYCLOHEXYL-18-CROWN-6|
|Publisher:||ROYAL SOC CHEMISTRY|
|Citation:||ANALYST, 116(9), 961-963|
|Abstract:||Niobium was quantitatively extracted from 7-10 mol dm-3 hydrochloric acid with 2.0 x 10(-2) mol dm-3 dicyclohexyl-18-crown-6 in dichloromethane. The metal was stripped from the organic phase with 0.1 mol dm-3 sulphuric acid and determined spectrophotometrically at 540 nm as its complex with 4-(2-thiazolylazo)resorcinol. This method permits the sequential separation of niobium from vanadium, tantalum, zirconium, hafnium and iron.|
|Appears in Collections:||Article|
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