The comparative distribution coefficients of W and Re on Al2O3, H-ZrO2, Silica-gel, Charcoal, HAP, Lead, H-MnO2 H-CeO2, H-TiO2, H-SnO2, organic anion, and cation exchangers were determined at different pH values and acid concentrations, in order to choose the most suitable exchanger for construction of a(188)W --> Re-188 generator. The experimental results clearly select Al2O3 as the best adsorbent. Other adsorbents may find application as tandem a column matrix to reduce the W-188 breakthrough in the final (ReO4-)-Re-188 eluate.