Method of adsorption-atomic-absorption determination of silver (I) using a modified polysiloxane

This study presents a new procedure for the preconcentration of trace levels of silver (I) in an aqueous matrix, through a minicolumn packed with a dithiooxamide-immobilised polysiloxane. The functionalized adsorbent has been synthesized by a sol-gel route and characterized by different physicochemical methods: an elemental analysis was made on a Perkin-Elmer automated analyzer, IR spectra were obtained with a Thermo Nicolet 6700 spectrometer,...