| Abstract: | The L'vov Platform converts the Massmann-type graphite furnace into a furnace that provides a constant temperature environment for the more volatile metals. A very great reduction of matrix interferences for Pb, Cd and Tl is reported, so long as the matrix concentration provides a background signal during atomization that is small enough to be controlled by the deuterium arc background corrector. Interferences for Cu, Mn and Sn are also reduced to some extent. L'vov's recent theory relating to vapor phase thermodynamics makes it possible to predict both qualitatively and semi-quantitatively many of the remaining interference effects. This provides potential solutions to remaining problems which are herein explored. The continued test of interferences reported in the literature indicates that most are not present in the modern furnaces when they are used in an optimum manner. |
