Background correction is important when using flameless atomization, especiallybelow 350 nm. Certain samples, when atomized, may absorb or scatter light from the lamp. Thiscan be caused by the presence of gaseous molecular species, salt particles, or smoke in thesample beam. If no correction is made, sample absorbance will be greater than it should be,and the analytical result will be erroneously high. Zeeman background correction is effective inovercoming composition or structured background interferences. It is particularly useful whenanalyzing for As in the presence of Al and when analyzing for Se in the presence of Fe