POTENTIOMETRIC DETERMINATION OF URANIUM IN THE PRESENCE OF VANADIUM, CHROMIUM, AND IRON, BY MEANS OF DIVALENT-CHROMIUM SALT

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Chemia Analityczna (Warsaw) (Poland)

OSTI ID:4154703

Minczewski, J; Kolyga, S

A method was developed for potentiometric titration of U(VI), V(V), Fe(III), and Cr(IV) mixtures with solutions of CrSO/sub 4/. Titration is carried out in a cell with Pt-electrode and saturated calomel electrode with continuous passing of a mixture of CO/sub 2 and H/sub 2/. The concentration of H/sub 2/O/ sub 4/ in titrated solutions is about 5%. Under these conditions the titration curve shows inflection points corresponding to reduction of Cr(VI) to Cr(III), V(V) to V(IV), Fe(III) to Fe(II), and one inflection which corresponds to reduction of U(VI) to U(IV) and V(IV) to V(III). The content of Cr(VI), V(V), and Fe(III) is determined from the first 3 jumps of potential; the content of U(VI) is calculated from the last inflection of the curve by subtracting the amount of CrSO/sub 4/ solution that is needed for the reduction of V(IV) to V(III) (which is determined from the 2nd jump of potential). On titration of Cr(VI), V(V), Fe(III), and U(VI, the average error amounts to 0.1, 0.2, 0.2, and 0.3 ml 0.1 N solution of CrSO/sub 4/, redpectively.

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-14-022866
• OSTI ID: 4154703
• Journal Information: Chemia Analityczna (Warsaw) (Poland), Journal Name: Chemia Analityczna (Warsaw) (Poland) Vol. Vol: 3; ISSN CANWA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CALOMEL
CARBON DIOXIDE
CHEMISTRY
CHROMIUM
CHROMIUM SULFATES
DIAGRAMS
ELECTRIC POTENTIAL
ELECTRODES
ELECTROLYTIC CELLS
HYDROGEN
IRON
MEASURED VALUES
MERCURY CHLORIDES
PLATINUM
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
REDUCTION
SOLUTIONS
SULFUR
SULFURIC ACID
URANIUM
VANADIUM