Liquid-liquid distribution of niobium in malonate solutions with liquid anion exchangers

Journal Article · Sat Dec 31 23:00:00 EST 1983 · Anal. Lett.; (United States)

DOI:https://doi.org/10.1080/00032718408065299· OSTI ID:6766753

Rao, R R; Kopkar, S M

Niobium was quantitatively extracted at pH 3-4.5 with 0.08 M Amberlite LA-2 in xylene from 0.02 M malonic acid. It was stripped from the organic phase with 0.25 M potassium carbonate solution and was determined spectrophotometrically with TAR at 540 nm. Apart from Amberlite AL-2, Primene JM-T quantitatively extracted niobium and xylene were the only satisfactory dilutents. Niobium was separated from various elements which formed weak complexes with malonic acid by stripping these elements before extraction of niobium. By the process of selective stripping it was separated from elements forming strong complexes. The method was used for the determination of niobium in stainless steel. Presented are results of systematic studies of extraction separation of niobium from malonic acid. The method was used for the determination of niobium in samples of stainless steel. 17 references, 6 tables.

• Research Organization: Indian Inst. of Tech., Bombay
• OSTI ID: 6766753
• Journal Information: Anal. Lett.; (United States), Journal Name: Anal. Lett.; (United States) Vol. 17:A6; ISSN ANALB
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104* -- Spectral Procedures-- (-1987)
400105 -- Separation Procedures
ABSORPTION SPECTROSCOPY
ALKALI METAL COMPOUNDS
ALKYLATED AROMATICS
ALLOYS
AROMATICS
CARBON COMPOUNDS
CARBONATES
CARBOXYLIC ACIDS
CHEMICAL ANALYSIS
CHROMIUM ALLOYS
CORROSION RESISTANT ALLOYS
DATA
DICARBOXYLIC ACIDS
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
INTERFERING ELEMENTS
ION EXCHANGE
ION EXCHANGE MATERIALS
IRON ALLOYS
IRON BASE ALLOYS
LIQUID ION EXCHANGERS
MALONIC ACID
MATERIALS
METALS
NIOBIUM
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC ION EXCHANGERS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PH VALUE
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
QUANTITATIVE CHEMICAL ANALYSIS
SOLVENTS
SPECTROSCOPY
STAINLESS STEELS
STEELS
TRANSITION ELEMENTS
XYLENES