Determination of titanium, zirconium, hafnium, niobium, tantalum, molybdenum, and tungsten in graphite materials by atomic absorption

Journal Article · Tue Nov 10 00:00:00 EST 1987 · J. Anal. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:7077214

Semenova, A A; Krondrat'eva, L I; Pinchuk, G P

A study has been made on the effects of sodium chloride added by impregnation of the electrodes and of sodium fluoride added in the usual way on the atomic-emission determination of Ti, Zr, Hf, Nb, Ta, Mo, and W in graphite. The NaCl and NaF increase the evaporation rates and reduce the limits of detection to about 10/sup -4/-10/sup -5/%. Two methods have been devised for determining Ti, Zr, Hf, Nb, Ta, Mo and W in graphite, which give s/sub r/ of 0.12-0.30. Sodium chloride impregnation gives limits of detection for Ti, Mo, and Hf lower by half an order of magnitude than that based on sodium fluoride.

• Research Organization: Obinsk Power Physics Institute (USSR)
• OSTI ID: 7077214
• Journal Information: J. Anal. Chem. USSR (Engl. Transl.); (United States), Vol. 42:5; Other Information: Translated from Zh. Anal. Khim.; 42: No. 5, 879-884(May 1987)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
GRAPHITE
ABSORPTION SPECTRA
HAFNIUM
MOLYBDENUM
NIOBIUM
TANTALUM
TITANIUM
TUNGSTEN
ZIRCONIUM
ELECTRODES
GRAPHITE MODERATED REACTORS
IMPREGNATION
MODERATORS
REACTOR MATERIALS
SENSITIVITY
SODIUM CHLORIDES
SODIUM FLUORIDES
ALKALI METAL COMPOUNDS
CARBON
CHLORIDES
CHLORINE COMPOUNDS
ELEMENTAL MINERALS
ELEMENTS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
MATERIALS
METALS
MINERALS
NONMETALS
REACTORS
SODIUM COMPOUNDS
SPECTRA
TRANSITION ELEMENTS
400102* - Chemical & Spectral Procedures
210300 - Power Reactors
Nonbreeding
Graphite Moderated