L. Bezur et J. Varga, DEVELOPMENT OF THERMO-AAS INSTRUMENTATION TO EVALUATE THE VOLATILIZATION OF METALS FROM DIFFERENT MATRICES, Microchemical journal, 51(3), 1995, pp. 319-330
Thermoatomic absorption spectrometry (TAAS) has been found to be a pro
mising new technique for evaluating the volatility of metal compounds
from complex matrices even at trace levels. Two TAAS instruments are d
escribed and evaluated, one based an the principle of direct combinati
on and the other on the principle of indirect combination of graphite
furnace evaporator, flame atomic absorption detection, and IR-optical
pyrometric temperature measurement. With the two different setups it w
as possible to carry out measurements in the atmosphere of a flame or
in a controlled inert atmosphere and also to do measurements in graphi
te, in pyrolitic graphite, or in a quartz-lined graphite sample holder
. The instruments were tested with different cadmium compounds used in
solid form and in aqueous solution and the TAAS curves were compared
to TG/DTG curves. (C) 1995 Academic Press, Inc.