Abstract
We synthesized a metal chelating sorbent by immobilizing a pyridazine derivative on glass beads and investigated the adsorption and separation behavior of the beads for metal ions. The beads were synthesized by reacting glass beads (amino-aryl-CPG) with 3-chloropyridazine-6-carboxylic acid hydrazide in toluene at 110°C for 12h. The exchange capacity of the beads for copper determined by a batch method was about 0.1mmol g-1 (glass beads). The beads reacted with various metal ions in several solutions of differing pH, and the degree to which the metal ions coordinated to the pyridazine derivative was indicated by a color change. Using a column method, metal ions were selectively retained, and then quantitatively and separately eluted from the beads by a stepwise elution employing several eluents, including hydrochloric acid. A column packed with the beads was successfully used to determine trace metal ions in both tap-and rain-water samples.
