DETERMINATION OF NIOBIUM AND TITANIUM AS TRIPLE COMPLEXES WITH PHOSPHOMOLYBDIC ACID

Journal Article · Fri Feb 01 04:00:00 EST 1963 · Zh. Analit. Khim.

OSTI ID:4718757

Shkaravskii, Yu F

The effect of oxalate, citrate, complexone III, fluoride, phosphate, and acidity on the stability of phosphomolybdic, phosphotitanomolybdic, and phosphoniobomolybdic complexes was studied. It was established that a colorless phosphomolybdic reagent with MoO/sub 4/: PO/sub 4/ = 2 at pH 1 quantitatively forms yellow heteropolycomplexes with Ti and Nb. The sensitivity of the reaction is 5 g of Ti or 10 g of Nb in 25 ml of solution. Niobium was determined in the presence of Ti on the basis of more rapid destruction of the phosphotitanomolybdic complex with fluoride followed by the extraction of the remaining phosphoniobomolybdic complex with 1-butanol. It was found that Ta does not give any yellow color with the phosphomolybdic reagent. A method is suggested for the determination of Nb in the presence of Ta. (auth)

• Research Organization: Kiev Inst. of General and Inorganic Chemistry
• NSA Number: NSA-17-021659
• OSTI ID: 4718757
• Journal Information: Zh. Analit. Khim., Journal Name: Zh. Analit. Khim. Vol. Vol: 18
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ACIDITY
BUTANOL
CHEMISTRY
CITRIC ACID
COLOR
EDTA
EFFICIENCY
FLUORIDES
MOLYBDENUM OXIDES
NIOBIUM
NIOBIUM COMPLEXES
OXALATES
PHOSPHATES
QUANTITATIVE ANALYSIS
SENSITIVITY
SOLUTIONS
SOLVENT EXTRACTION
STABILITY
TANTALUM COMPLEXES
TITANIUM
TITANIUM COMPLEXES