ON POLAROGRAPHIC BEHAVIOUR OF TUNGSTEN, NIOBIUM, TITANIUM AND IRON WHEN PRESENT TOGETHER IN PYROPHOSPHORIC ACID SOLUTIONS

Journal Article · Sat Sep 01 04:00:00 EDT 1962 · Zh. Analit. Khim.

OSTI ID:4757635

Kurbatov, D I; Skorynina, I S

The polarographic behavior of tungsten in H/sub 4/P/sub 2/O/sub 7/ solutions of various concentrations was studied. It was established that in 18 N H/sub 4/P/sub 2/O/sub 7/ tungsten is reversibly reduced and gives one clearly defined wave. The value of the limiting current is a linear function of the tungsten concentration. The half-wave potential of tungsten is shifted considerably towards more negative potentials on the decrease of the H/sub 4/P/ sub 2/O/sub 7/ concentration. Optimum conditions were found for the polarographic determination of tungsten in the presence of niobium. The most favorable conditions for the determination of nation of niobium are 17-18 N H/sub 4/P/sub 2/O/sub 7/. The determination of tungsten in the presence of titanium was carried out in 10 N H/sub 4/P/sub 2/O/sub 7/ (H/sub 4/P/sub 2/O/sub 7/: H/sub 2/O = 1 : 1 by vo lume). Conditions were found for the determination of tungsten, niobium, titanium, and iron when present together. (auth)

• Research Organization: Inst. of Chemistry, Academy of Sciences, USSR
• NSA Number: NSA-17-002924
• OSTI ID: 4757635
• Journal Information: Zh. Analit. Khim., Journal Name: Zh. Analit. Khim. Vol. Vol: 17
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

CHEMISTRY
IRON
NIOBIUM
PHOSPHORIC ACID
POLAROGRAPHY
QUANTITATIVE ANALYSIS
SOLUTIONS
TITANIUM
TUNGSTEN