S. Walter et A. Aleboyeh, NEAR MELTING-POINT FLOW-INJECTION - A DRASTIC ENHANCEMENT IN FAAS DETECTION LIMITS, Fresenius' journal of analytical chemistry, 355(5-6), 1996, pp. 687-689
The described technique is based on segregation phenomena taking place
in solids near their melting point. High impurity concentration occur
s in a liquid phase at the grain boundaries. A continuous flow of an a
dequate solvent is used in far from equilibrium conditions to reach hi
gh extraction efficiency of the analyte. As an example, the determinat
ion of trace amounts of caesium in metallic sodium is described. The 5
mg/kg detection limit of conventional FAAS is thus lowered to a few m
u g/kg.