Polarographic determination of tungsten and molybdenum in sedimentary rocks

Journal Article · Sun Dec 01 00:00:00 EST 1985 · J. Anal. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:7170367

Vakhobova, R U; Lykova, F P; Milyavskii, Yu S; Rachinskaya, G F

In order to determine microamounts of tungsten and molybdenum, one the most sensitive versions of polarography is used in this paper, called catalytic currents. In the development of a procedure for the determination of tungsten and molybdenum in geochemical items, the reduction of hydroxylamine (HA) is used, catalyzed by tungsten and molybdenum compounds in the presence of pyrocatechol, as on a background of dicarboxylic acids and hydroxy acids the HA reduction half-wave potentials, catalyzed by these elements, coincide. The investigations were conducted on a PPT-1 polarograph in the classical regime in a thermostatically controlled cell with a mercury dripping electrode and a saturated calomel comparison electrode. The authors develop a procedure for the simultaneous determination of n.10/sup -5/-n.10/sup -4/% of tungsten and molybdenum in sedimentary rocks.

• Research Organization: V.I. Lenin Tadshik State University, Dushanbe
• OSTI ID: 7170367
• Journal Information: J. Anal. Chem. USSR (Engl. Transl.); (United States), Vol. 40:6,PT.2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
MOLYBDENUM
POLAROGRAPHY
QUANTITATIVE CHEMICAL ANALYSIS
SEDIMENTARY ROCKS
TUNGSTEN
CATALYSIS
CATALYTIC EFFECTS
ELECTROCHEMICAL CELLS
ELECTRODES
GEOCHEMISTRY
HYDROXYLAMINE
PYROCATECHOL
QUANTITY RATIO
TRACE AMOUNTS
AMINES
AROMATICS
CHEMICAL ANALYSIS
CHEMISTRY
DEVELOPERS
ELEMENTS
HYDROXY COMPOUNDS
METALS
ORGANIC COMPOUNDS
PHENOLS
POLYPHENOLS
ROCKS
TRANSITION ELEMENTS
400105* - Separation Procedures