Determination of tellurium in gallium by alternating current stripping voltammetry with a mercury/graphite electrode

Journal Article · Tue Apr 01 00:00:00 EST 1986 · Ind. Lab. (Engl. Transl.); (United States)

OSTI ID:7194835

Berengard, I B; Kaplan, B Ya

The analytical signal in ac stripping coltammetry (ACSV) with mercury indicator electrodes depends on the weight of the electrolytically collected analyte at the electrode surface, the depth of the collection layer being equal to the effective diffusion-layer thickness. Replacement of the static mercury drop electrode (SMDE) by the mercury/graphite electrode (MGE) is of practical interest in that the analyte detection limit can be lowered by decreasing the colume of the telluriumcontaining polarographed solution; in addition, plant laboratories find it difficult to control the SDME uniformity. The work in this article was done on a PU-1 universal polarograph in a square-wave vol tage component mode using the three-electrode cell shown. The rotating mercury/graphite electrode is found by the authors to be superior to the static mercury drop electrode in that it can lower the detection limit for tellurium in gallium to 5.10 /SUP -7percent/ , due to the smaller volume of the polarographed solution.

• Research Organization: State Scientific-Research and Design Institute of the Rare-Metal Industry
• OSTI ID: 7194835
• Journal Information: Ind. Lab. (Engl. Transl.); (United States), Vol. 51:10
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
GALLIUM
POLAROGRAPHY
VOLTAMETRY
TELLURIUM
ALTERNATING CURRENT
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTIC CELLS
GRAPHITE
HYDROGEN COMPOUNDS
IODINE COMPOUNDS
MERCURY
QUANTITATIVE CHEMICAL ANALYSIS
REDUCTION
CARBON
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMISTRY
CURRENTS
ELECTRIC CURRENTS
ELEMENTAL MINERALS
ELEMENTS
HALOGEN COMPOUNDS
METALS
MINERALS
NONMETALS
SEMIMETALS
400102* - Chemical & Spectral Procedures