When analysing heavy elements like lead, cadmium and mercury in low density matrices such as polymers finite thickness (FT) and fluorescence volume geometry (FVG) effects are always present and must be accounted for. For thin samples of low density FT effects are more prominent. Conversely, when analysing heavy elements in thick samples with low density, FVG effects are prominent.
This tech paper outlines the ability to deal with the challenge of FT in thin samples and FVG effect in thicker low density samples.