3rd Black Sea Basin Conference on Analytical Chemistry, Constanta, Romanya, 12 - 14 Eylül 2005, ss.33
Hydrogels are increasingly being used to control mass transport in the
analytical determinetion of trace elements. The present technique of diffiısive
gradients in thin films (DGT) an in situ means of quantitatively measuring labile
species in aqueous systems. In DGT, metals are bounded to a resin layer after
passing through a well defined diffusion layer. As was measured in FeaOa gel layer
by ICP-MS after eluated suitable eluent. In this study As speciation was
investigated by using new gel layer Fe20 3 and the optimum conditions were
determined which include pH, ionic streght, different gel thickness and different
eluent soiution [1].