SOLID PHASE EXTRACTION OF CD(II) USING MESOPOROUS ORGANOSILICA NANOPARTICLES MODIFIED WITH RESACETOPHENONE.

A new analytical method using Resacetophenone (RATP) modified SiO2 nanoparticles as solid-phase extractant has been developed for the preconcentration of trace amounts of Cd(II) in different water samples. Conditions of the analysis such as preconcentration factor, effect of pH, sample volume, shaking time, elution conditions and effects of interfering ions for the recovery of analyte were investigated. The adsorption equilibrium of Cd(II) on nanometer SiO2-RATP was achieved within 15 mins. Adsorbed Cd(II) was easily eluted with 5mL of 2M hydrochloric acid. The adsorption capacity of nanometer SiO2-RATP was found to be 88.34|molg- at optimum pH and the detection limit (3o) was 0.60|gL-1. The extractant showed rapid kinetic sorption. The maximum preconcentration factor was 60. The method was applied for the determination of trace amounts of Cd(II) in various water samples (tap, mineral water and industrial effluents) and nail paints.