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|Title: ||LIQUID-LIQUID-EXTRACTION OF NIOBIUM(V) IN THE PRESENCE OF OTHER METALS WITH HIGH-MOLECULAR-MASS AMINES AND ASCORBIC-ACID|
|Authors: ||KARVE, MA|
|Issue Date: ||1993|
|Publisher: ||ELSEVIER SCIENCE BV|
|Citation: ||TALANTA, 40(6), 913-917|
|Abstract: ||A novel method is proposed for the solvent extraction of niobium(V). A 0.1M solution of Aliquat 336S in xylene quantitatively ''tracts microgram quantities of niobium(V) from 0.01M ascorbic acid at pH 3.5-6.5. Niobium from the organic phase is stripped with 0.5M nitric acid and determined spectrophotometrically in the aqueous phase as its complex with TAR. The method permits separation of niobium not only from tantalum(V) but also from vanadium(IV), titanium(IV), zirconium(IV), thorium(IV), chromium(III), molybdenum(VI), uranium(VI), iron(III), etc. Niobium from stainless steel was determined with a precision of 0.42%.|
|Appears in Collections:||Article|
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