Synthesis and Charcterzation of SilicaImmobilized Benzene-Diazo-Dmino-Azobenzene

Chelating groups can be chemically bonded to the surface of solid supports such as silica.Immobilization reations on silica are relatively simple, especially when compared to immobilization involving organic polymers. Because silica exhibits the good mechanical strength,swelling stability and the fast metal ion exchange kinetics, such materials are gaining increasing importance for the separation and enrichment of trace metal ions from dilute aqueous solution.