We propose a design solution for a graphite crucible atomizer with cell-channel structures for direct atomic absorption analysis of powdered samples. The evaporation zone in the crucible incorporates a graphite block (container) with cell-channels to accommodate and separate measured portions of the powdered sample. This modification alters the conditions of thermal decomposition and evaporation of organomineral samples, reduces interferences, and lowers the detection limits of elements (Ag, Bi, Cd, Tl) in preconcentrates and natural water suspensions.
Oreshkin et al. (Sun,) studied this question.